diff --git a/kjvstudy_org/templates/about.html b/kjvstudy_org/templates/about.html
index df8f29e..9fc39dc 100644
--- a/kjvstudy_org/templates/about.html
+++ b/kjvstudy_org/templates/about.html
@@ -130,9 +130,6 @@
             <li><a href="/about/stats">Site Statistics</a> — Comprehensive metrics on coverage and content</li>
             <li><a href="/about/commentary">Commentary Index</a> — Browse all verses with in-depth analysis</li>
             <li><a href="/about/cross-references">Cross-References Index</a> — Explore Scripture's interconnections</li>
-            <li><a href="/strongs">Strong's Concordance</a> — Hebrew and Greek word studies</li>
-            <li><a href="/study-guides">Study Guides</a> — Thematic studies on biblical topics</li>
-            <li><a href="/reading-plans">Reading Plans</a> — Structured approaches to Scripture reading</li>
             <li><a href="/api/docs" target="_blank">API Documentation</a> — For developers building on our data</li>
         </ul>
     </section>
diff --git a/pyproject.toml b/pyproject.toml
index ebc20d7..f13d17c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,6 +41,7 @@ package = true
 [dependency-groups]
 dev = [
     "pytest>=8.3.5",
+    "pytest-cov>=7.0.0",
 ]
 
 [tool.pytest.ini_options]
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..d7122d8
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,828 @@
+"""
+Tests for utility modules - search, books, stories, biographies, etc.
+Targeting modules with lower test coverage.
+"""
+import pytest
+from fastapi.testclient import TestClient
+
+
+class TestSearchModule:
+    """Tests for kjvstudy_org.utils.search module"""
+
+    def test_calculate_relevance_score_single_term(self):
+        """Test relevance score calculation with single term"""
+        from kjvstudy_org.utils.search import calculate_relevance_score
+
+        text = "In the beginning God created the heaven and the earth."
+        score = calculate_relevance_score(text, ["beginning"])
+        assert score > 0
+
+    def test_calculate_relevance_score_multiple_terms(self):
+        """Test relevance score with multiple search terms"""
+        from kjvstudy_org.utils.search import calculate_relevance_score
+
+        text = "For God so loved the world"
+        score = calculate_relevance_score(text, ["god", "loved"])
+        # Should get points for both terms
+        assert score >= 2.0
+
+    def test_calculate_relevance_score_word_boundaries(self):
+        """Test that exact word matches get bonus"""
+        from kjvstudy_org.utils.search import calculate_relevance_score
+
+        text = "God is love"
+        score_exact = calculate_relevance_score(text, ["love"])
+        # Exact word match should have bonus
+        assert score_exact > 1.0
+
+    def test_calculate_relevance_score_multiple_occurrences(self):
+        """Test that multiple occurrences increase score"""
+        from kjvstudy_org.utils.search import calculate_relevance_score
+
+        text = "The LORD is my shepherd. The LORD is good."
+        score = calculate_relevance_score(text, ["lord"])
+        # Should count both occurrences
+        assert score >= 2.0
+
+    def test_highlight_search_terms_basic(self):
+        """Test basic search term highlighting"""
+        from kjvstudy_org.utils.search import highlight_search_terms
+
+        text = "For God so loved the world"
+        highlighted = highlight_search_terms(text, ["god"])
+        assert "<mark>" in highlighted
+        assert "</mark>" in highlighted
+
+    def test_highlight_search_terms_case_insensitive(self):
+        """Test case insensitive highlighting"""
+        from kjvstudy_org.utils.search import highlight_search_terms
+
+        text = "The LORD is my shepherd"
+        highlighted = highlight_search_terms(text, ["lord"])
+        assert "<mark>" in highlighted
+
+    def test_highlight_search_terms_multiple(self):
+        """Test highlighting multiple terms"""
+        from kjvstudy_org.utils.search import highlight_search_terms
+
+        text = "God is love"
+        highlighted = highlight_search_terms(text, ["god", "love"])
+        # Should have two mark tags
+        assert highlighted.count("<mark>") == 2
+
+    def test_ensure_search_index(self):
+        """Test search index initialization"""
+        from kjvstudy_org.utils.search import ensure_search_index
+
+        # Should return True if FTS available, False otherwise
+        result = ensure_search_index()
+        assert isinstance(result, bool)
+
+    def test_perform_full_text_search_verse_reference(self):
+        """Test search with verse reference"""
+        from kjvstudy_org.utils.search import perform_full_text_search
+
+        # Test with verse reference format
+        results = perform_full_text_search("John 3:16")
+        assert len(results) >= 1
+        assert results[0]["book"] == "John"
+        assert results[0]["chapter"] == 3
+        assert results[0]["verse"] == 16
+
+    def test_perform_full_text_search_regular_query(self):
+        """Test regular keyword search"""
+        from kjvstudy_org.utils.search import perform_full_text_search
+
+        results = perform_full_text_search("love", limit=10)
+        assert len(results) > 0
+        # All results should have the search term (or stem)
+        for result in results:
+            text_lower = result["text"].lower()
+            # FTS may use stemming, so check for love/loved/loves
+            assert "love" in text_lower or "loved" in text_lower or "loves" in text_lower
+
+
+class TestBooksModule:
+    """Tests for kjvstudy_org.books module"""
+
+    def test_get_book_data_genesis(self):
+        """Test getting data for Genesis"""
+        from kjvstudy_org.books import get_book_data
+
+        data = get_book_data("Genesis")
+        assert data is not None
+        assert "introduction" in data or "name" in data
+
+    def test_get_book_data_psalms(self):
+        """Test getting data for Psalms"""
+        from kjvstudy_org.books import get_book_data
+
+        data = get_book_data("Psalms")
+        assert data is not None
+
+    def test_get_book_data_invalid(self):
+        """Test getting data for non-existent book"""
+        from kjvstudy_org.books import get_book_data
+
+        data = get_book_data("NotABook")
+        assert data is None
+
+    def test_get_book_introduction(self):
+        """Test getting book introduction"""
+        from kjvstudy_org.books import get_book_introduction
+
+        intro = get_book_introduction("Genesis")
+        # Should return string or None
+        assert intro is None or isinstance(intro, str)
+
+    def test_get_book_themes(self):
+        """Test getting book themes"""
+        from kjvstudy_org.books import get_book_themes
+
+        themes = get_book_themes("Genesis")
+        # Should return list or None
+        assert themes is None or isinstance(themes, list)
+
+    def test_get_book_key_verses(self):
+        """Test getting key verses"""
+        from kjvstudy_org.books import get_book_key_verses
+
+        verses = get_book_key_verses("John")
+        assert verses is None or isinstance(verses, list)
+
+    def test_get_book_outline(self):
+        """Test getting book outline"""
+        from kjvstudy_org.books import get_book_outline
+
+        outline = get_book_outline("Romans")
+        assert outline is None or isinstance(outline, list)
+
+    def test_get_book_christ_in_book(self):
+        """Test getting Christ in book section"""
+        from kjvstudy_org.books import get_book_christ_in_book
+
+        result = get_book_christ_in_book("Isaiah")
+        assert result is None or isinstance(result, str)
+
+    def test_get_book_metadata(self):
+        """Test getting book metadata"""
+        from kjvstudy_org.books import get_book_metadata
+
+        metadata = get_book_metadata("Matthew")
+        if metadata:
+            assert "testament" in metadata or "name" in metadata
+
+    def test_get_book_metadata_invalid(self):
+        """Test getting metadata for invalid book"""
+        from kjvstudy_org.books import get_book_metadata
+
+        metadata = get_book_metadata("FakeBook")
+        assert metadata is None
+
+    def test_get_all_books_metadata(self):
+        """Test getting all books metadata"""
+        from kjvstudy_org.books import get_all_books_metadata
+
+        all_books = get_all_books_metadata()
+        assert isinstance(all_books, list)
+        # Should have 66 books
+        assert len(all_books) == 66
+
+    def test_has_book_data(self):
+        """Test checking if book has data"""
+        from kjvstudy_org.books import has_book_data
+
+        assert has_book_data("Genesis") is True
+        assert has_book_data("NotABook") is False
+
+    def test_get_books_by_category(self):
+        """Test getting books by category"""
+        from kjvstudy_org.books import get_books_by_category
+
+        categories = get_books_by_category()
+        assert isinstance(categories, dict)
+        # Should have multiple categories
+        assert len(categories) > 0
+
+
+class TestStoriesModule:
+    """Tests for kjvstudy_org.stories module"""
+
+    def test_load_all_stories(self):
+        """Test loading all stories"""
+        from kjvstudy_org.stories import load_all_stories
+
+        stories = load_all_stories()
+        assert isinstance(stories, list)
+
+    def test_get_all_stories_flat(self):
+        """Test getting flat list of stories"""
+        from kjvstudy_org.stories import get_all_stories_flat
+
+        stories = get_all_stories_flat()
+        assert isinstance(stories, list)
+        if len(stories) > 0:
+            # Each story should have category info attached
+            story = stories[0]
+            assert "category_name" in story or "slug" in story
+
+    def test_get_story_by_slug_exists(self):
+        """Test getting existing story by slug"""
+        from kjvstudy_org.stories import get_all_stories_flat, get_story_by_slug
+
+        all_stories = get_all_stories_flat()
+        if len(all_stories) > 0:
+            first_slug = all_stories[0].get("slug")
+            if first_slug:
+                story = get_story_by_slug(first_slug)
+                assert story is not None
+
+    def test_get_story_by_slug_not_exists(self):
+        """Test getting non-existent story"""
+        from kjvstudy_org.stories import get_story_by_slug
+
+        story = get_story_by_slug("not-a-real-story-slug-12345")
+        assert story is None
+
+    def test_get_stories_by_category(self):
+        """Test getting stories by category"""
+        from kjvstudy_org.stories import load_all_stories, get_stories_by_category
+
+        categories = load_all_stories()
+        if len(categories) > 0:
+            cat_slug = categories[0].get("slug")
+            if cat_slug:
+                stories = get_stories_by_category(cat_slug)
+                assert isinstance(stories, list)
+
+    def test_get_stories_by_invalid_category(self):
+        """Test getting stories from non-existent category"""
+        from kjvstudy_org.stories import get_stories_by_category
+
+        stories = get_stories_by_category("not-a-real-category")
+        assert stories == []
+
+    def test_get_category_by_slug_exists(self):
+        """Test getting existing category"""
+        from kjvstudy_org.stories import load_all_stories, get_category_by_slug
+
+        categories = load_all_stories()
+        if len(categories) > 0:
+            slug = categories[0].get("slug")
+            if slug:
+                category = get_category_by_slug(slug)
+                assert category is not None
+
+    def test_get_category_by_slug_not_exists(self):
+        """Test getting non-existent category"""
+        from kjvstudy_org.stories import get_category_by_slug
+
+        category = get_category_by_slug("fake-category-slug-xyz")
+        assert category is None
+
+    def test_get_story_count(self):
+        """Test getting story count"""
+        from kjvstudy_org.stories import get_story_count
+
+        count = get_story_count()
+        assert isinstance(count, int)
+        assert count >= 0
+
+    def test_get_category_count(self):
+        """Test getting category count"""
+        from kjvstudy_org.stories import get_category_count
+
+        count = get_category_count()
+        assert isinstance(count, int)
+        assert count >= 0
+
+    def test_get_categories(self):
+        """Test getting categories"""
+        from kjvstudy_org.stories import get_categories
+
+        categories = get_categories()
+        assert isinstance(categories, list)
+
+    def test_refresh_stories(self):
+        """Test refreshing story cache"""
+        from kjvstudy_org.stories import refresh_stories, get_categories
+
+        # Should not raise
+        refresh_stories()
+        categories = get_categories()
+        assert isinstance(categories, list)
+
+
+class TestBiblicalBiographies:
+    """Tests for kjvstudy_org.biblical_biographies module"""
+
+    def test_get_biography_abraham(self):
+        """Test getting Abraham's biography"""
+        from kjvstudy_org.biblical_biographies import get_biography
+
+        bio = get_biography("Abraham")
+        assert bio is not None
+        assert isinstance(bio, dict)
+
+    def test_get_biography_david(self):
+        """Test getting David's biography"""
+        from kjvstudy_org.biblical_biographies import get_biography
+
+        bio = get_biography("David")
+        assert bio is not None
+
+    def test_get_biography_not_exists(self):
+        """Test getting non-existent biography"""
+        from kjvstudy_org.biblical_biographies import get_biography
+
+        bio = get_biography("Not A Real Person At All")
+        assert bio is None
+
+    def test_get_biography_via_alias(self):
+        """Test getting biography via alias name"""
+        from kjvstudy_org.biblical_biographies import get_biography, BIOGRAPHY_ALIASES
+
+        # If there are aliases, test one
+        if BIOGRAPHY_ALIASES:
+            alias = next(iter(BIOGRAPHY_ALIASES.keys()))
+            bio = get_biography(alias)
+            # Should either find via alias or return None if canonical not found
+            # Just verify no crash
+            assert bio is None or isinstance(bio, dict)
+
+    def test_has_biography_exists(self):
+        """Test checking existing biography"""
+        from kjvstudy_org.biblical_biographies import has_biography
+
+        assert has_biography("Abraham") is True
+
+    def test_has_biography_not_exists(self):
+        """Test checking non-existent biography"""
+        from kjvstudy_org.biblical_biographies import has_biography
+
+        assert has_biography("Totally Made Up Person") is False
+
+    def test_has_biography_via_alias(self):
+        """Test checking biography via alias"""
+        from kjvstudy_org.biblical_biographies import has_biography, BIOGRAPHY_ALIASES
+
+        if BIOGRAPHY_ALIASES:
+            alias = next(iter(BIOGRAPHY_ALIASES.keys()))
+            # Should return boolean
+            result = has_biography(alias)
+            assert isinstance(result, bool)
+
+
+class TestRedLetterModule:
+    """Tests for kjvstudy_org.red_letter module"""
+
+    def test_load_red_letter_verses(self):
+        """Test loading red letter verses"""
+        from kjvstudy_org.red_letter import load_red_letter_verses
+
+        verses = load_red_letter_verses()
+        assert isinstance(verses, dict)
+
+    def test_get_christ_words_known_verse(self):
+        """Test getting Christ's words from known red letter verse"""
+        from kjvstudy_org.red_letter import get_christ_words
+
+        # John 3:16 - Jesus speaking
+        words = get_christ_words("John", 3, 16)
+        # May or may not be marked as red letter depending on data
+        # Just verify no crash
+        assert words is None or isinstance(words, str)
+
+    def test_get_christ_words_not_red_letter(self):
+        """Test verse without Christ's words"""
+        from kjvstudy_org.red_letter import get_christ_words
+
+        # Genesis 1:1 - Not Jesus speaking
+        words = get_christ_words("Genesis", 1, 1)
+        assert words is None
+
+    def test_wrap_red_letter_text_no_words(self):
+        """Test wrapping text when no Christ words"""
+        from kjvstudy_org.red_letter import wrap_red_letter_text
+
+        text = "In the beginning God created the heaven and the earth."
+        result = wrap_red_letter_text(text, "Genesis", 1, 1)
+        # Should return unchanged if no red letter
+        assert result == text
+
+    def test_wrap_red_letter_text_full_verse(self):
+        """Test wrapping full verse red letter"""
+        from kjvstudy_org.red_letter import wrap_red_letter_text, load_red_letter_verses
+
+        verses = load_red_letter_verses()
+        # Find a verse marked as 'full'
+        full_verse = None
+        for ref, words in verses.items():
+            if words == 'full':
+                full_verse = ref
+                break
+
+        if full_verse:
+            # Parse reference
+            parts = full_verse.rsplit(' ', 1)
+            if len(parts) == 2:
+                book = parts[0]
+                chap_verse = parts[1].split(':')
+                if len(chap_verse) == 2:
+                    chapter, verse = int(chap_verse[0]), int(chap_verse[1])
+                    text = "Some verse text"
+                    result = wrap_red_letter_text(text, book, chapter, verse)
+                    assert 'class="words-of-christ"' in result
+
+
+class TestHelpersModule:
+    """Tests for kjvstudy_org.utils.helpers module"""
+
+    def test_create_slug_basic(self):
+        """Test basic slug creation"""
+        from kjvstudy_org.utils.helpers import create_slug
+
+        slug = create_slug("Hello World")
+        assert slug == "hello-world"
+
+    def test_create_slug_special_chars(self):
+        """Test slug with special characters"""
+        from kjvstudy_org.utils.helpers import create_slug
+
+        slug = create_slug("God's Love!")
+        assert "'" not in slug
+        assert "!" not in slug
+
+    def test_create_slug_numbers(self):
+        """Test slug with numbers"""
+        from kjvstudy_org.utils.helpers import create_slug
+
+        slug = create_slug("John 3:16")
+        assert isinstance(slug, str)
+        assert len(slug) > 0
+
+    def test_is_verse_reference_valid(self):
+        """Test valid verse reference detection"""
+        from kjvstudy_org.utils.helpers import is_verse_reference
+
+        assert is_verse_reference("John 3:16") is True
+        assert is_verse_reference("Genesis 1:1") is True
+        assert is_verse_reference("1 John 4:8") is True
+
+    def test_is_verse_reference_invalid(self):
+        """Test invalid verse reference detection"""
+        from kjvstudy_org.utils.helpers import is_verse_reference
+
+        assert is_verse_reference("hello world") is False
+        assert is_verse_reference("God is love") is False
+
+    def test_parse_verse_reference_valid(self):
+        """Test parsing valid verse reference"""
+        from kjvstudy_org.utils.helpers import parse_verse_reference
+
+        result = parse_verse_reference("John 3:16")
+        assert result is not None
+        assert result["book"] == "John"
+        assert result["chapter"] == 3
+        assert result["verse"] == 16
+
+    def test_parse_verse_reference_invalid(self):
+        """Test parsing invalid verse reference"""
+        from kjvstudy_org.utils.helpers import parse_verse_reference
+
+        result = parse_verse_reference("not a verse")
+        assert result is None
+
+    def test_get_verse_text(self):
+        """Test getting verse text"""
+        from kjvstudy_org.utils.helpers import get_verse_text
+
+        text = get_verse_text("John", 3, 16)
+        assert isinstance(text, str)
+        assert len(text) > 0
+
+    def test_get_verse_text_invalid(self):
+        """Test getting text for invalid verse"""
+        from kjvstudy_org.utils.helpers import get_verse_text
+
+        text = get_verse_text("FakeBook", 999, 999)
+        # Should return some fallback string
+        assert isinstance(text, str)
+
+    def test_get_daily_verse(self):
+        """Test getting daily verse"""
+        from kjvstudy_org.utils.helpers import get_daily_verse
+
+        verse = get_daily_verse()
+        assert isinstance(verse, dict)
+        assert "book" in verse
+        assert "chapter" in verse
+        assert "verse" in verse
+        assert "text" in verse
+
+    def test_get_chapter_popularity_score(self):
+        """Test getting chapter popularity score"""
+        from kjvstudy_org.utils.helpers import get_chapter_popularity_score
+
+        # Psalms 23 should be popular
+        score = get_chapter_popularity_score("Psalms", 23)
+        assert isinstance(score, int)
+        assert 1 <= score <= 10
+
+    def test_get_chapter_popularity_explanation(self):
+        """Test getting chapter popularity explanation"""
+        from kjvstudy_org.utils.helpers import get_chapter_popularity_explanation
+
+        explanation = get_chapter_popularity_explanation("Psalms", 23)
+        assert isinstance(explanation, str)
+        assert len(explanation) > 0
+
+    def test_get_related_content(self):
+        """Test getting related content"""
+        from kjvstudy_org.utils.helpers import get_related_content
+
+        related = get_related_content("John", 3, 16)
+        assert isinstance(related, dict)
+        assert "study_guides" in related
+        assert "topics" in related
+
+
+class TestCommentaryLoaderModule:
+    """Tests for kjvstudy_org.utils.commentary_loader module"""
+
+    def test_load_commentary(self):
+        """Test loading commentary data"""
+        from kjvstudy_org.utils.commentary_loader import load_commentary
+
+        commentary = load_commentary()
+        assert isinstance(commentary, dict)
+
+    def test_load_commentary_flat(self):
+        """Test loading flat commentary"""
+        from kjvstudy_org.utils.commentary_loader import load_commentary_flat
+
+        flat = load_commentary_flat()
+        assert isinstance(flat, dict)
+        # Keys should be like "Book Chapter:Verse"
+        if flat:
+            key = next(iter(flat.keys()))
+            assert ":" in key
+
+    def test_normalize_entry_valid(self):
+        """Test normalizing valid entry"""
+        from kjvstudy_org.utils.commentary_loader import _normalize_entry
+
+        entry = {
+            "analysis": "Some analysis",
+            "historical": "Historical context",
+            "questions": ["Q1", "Q2"]
+        }
+        normalized = _normalize_entry(entry)
+        assert normalized["analysis"] == "Some analysis"
+        assert normalized["historical"] == "Historical context"
+        assert len(normalized["questions"]) == 2
+
+    def test_normalize_entry_with_historical_context(self):
+        """Test normalizing entry with historical_context key"""
+        from kjvstudy_org.utils.commentary_loader import _normalize_entry
+
+        entry = {
+            "analysis": "Analysis",
+            "historical_context": "Context via alternative key"
+        }
+        normalized = _normalize_entry(entry)
+        assert normalized["historical"] == "Context via alternative key"
+
+    def test_normalize_entry_invalid(self):
+        """Test normalizing non-dict entry"""
+        from kjvstudy_org.utils.commentary_loader import _normalize_entry
+
+        result = _normalize_entry("not a dict")
+        assert result["analysis"] == ""
+        assert result["historical"] == ""
+        assert result["questions"] == []
+
+    def test_slugify(self):
+        """Test slugify function"""
+        from kjvstudy_org.utils.commentary_loader import _slugify
+
+        assert _slugify("Genesis") == "genesis"
+        assert _slugify("1 John") == "1_john"
+        assert _slugify("Song of Solomon") == "song_of_solomon"
+
+
+class TestInterlinearLoader:
+    """Tests for kjvstudy_org.interlinear_loader module"""
+
+    def test_get_interlinear_data_genesis(self):
+        """Test getting interlinear data for Genesis 1:1"""
+        from kjvstudy_org.interlinear_loader import get_interlinear_data
+
+        data = get_interlinear_data("Genesis", 1, 1)
+        # Returns list of word data or None
+        assert data is None or isinstance(data, (dict, list))
+        if isinstance(data, list) and len(data) > 0:
+            # Each item should have word info
+            assert "original" in data[0] or "english" in data[0]
+
+    def test_get_interlinear_data_john(self):
+        """Test getting interlinear data for John 1:1"""
+        from kjvstudy_org.interlinear_loader import get_interlinear_data
+
+        data = get_interlinear_data("John", 1, 1)
+        assert data is None or isinstance(data, (dict, list))
+
+    def test_get_interlinear_data_invalid(self):
+        """Test getting interlinear data for invalid verse"""
+        from kjvstudy_org.interlinear_loader import get_interlinear_data
+
+        data = get_interlinear_data("FakeBook", 999, 999)
+        assert data is None
+
+
+class TestCrossReferencesModule:
+    """Tests for kjvstudy_org.cross_references module"""
+
+    def test_get_cross_references_john_3_16(self):
+        """Test getting cross references for John 3:16"""
+        from kjvstudy_org.cross_references import get_cross_references
+
+        refs = get_cross_references("John", 3, 16)
+        assert isinstance(refs, list)
+
+    def test_get_cross_references_genesis(self):
+        """Test getting cross references for Genesis 1:1"""
+        from kjvstudy_org.cross_references import get_cross_references
+
+        refs = get_cross_references("Genesis", 1, 1)
+        assert isinstance(refs, list)
+
+    def test_get_cross_references_invalid(self):
+        """Test getting cross references for invalid verse"""
+        from kjvstudy_org.cross_references import get_cross_references
+
+        refs = get_cross_references("NotABook", 999, 999)
+        assert isinstance(refs, list)
+        assert len(refs) == 0
+
+
+class TestPdfModule:
+    """Tests for kjvstudy_org.utils.pdf module"""
+
+    def test_weasyprint_available_flag(self):
+        """Test that WEASYPRINT_AVAILABLE flag is set"""
+        from kjvstudy_org.utils.pdf import WEASYPRINT_AVAILABLE
+
+        assert isinstance(WEASYPRINT_AVAILABLE, bool)
+
+    def test_render_html_to_pdf_when_available(self):
+        """Test PDF rendering when weasyprint available"""
+        from kjvstudy_org.utils.pdf import WEASYPRINT_AVAILABLE, render_html_to_pdf
+
+        if WEASYPRINT_AVAILABLE:
+            html = "<html><body><h1>Test</h1></body></html>"
+            pdf_buffer = render_html_to_pdf(html)
+            assert pdf_buffer is not None
+            # Should be at position 0
+            assert pdf_buffer.tell() == 0
+            # Should have PDF content
+            content = pdf_buffer.read()
+            assert content.startswith(b'%PDF')
+        else:
+            # Should raise RuntimeError when not available
+            with pytest.raises(RuntimeError):
+                render_html_to_pdf("<html></html>")
+
+    def test_render_html_to_pdf_async(self):
+        """Test async PDF rendering function exists"""
+        from kjvstudy_org.utils.pdf import WEASYPRINT_AVAILABLE, render_html_to_pdf_async
+        import asyncio
+
+        # Just verify the async function exists and is callable
+        assert callable(render_html_to_pdf_async)
+
+        # If weasyprint available, test via sync wrapper
+        if WEASYPRINT_AVAILABLE:
+            html = "<html><body><p>Async Test</p></body></html>"
+            # Run async function synchronously for testing
+            loop = asyncio.new_event_loop()
+            try:
+                pdf_buffer = loop.run_until_complete(render_html_to_pdf_async(html))
+                assert pdf_buffer is not None
+                content = pdf_buffer.read()
+                assert content.startswith(b'%PDF')
+            finally:
+                loop.close()
+
+
+class TestTopicsModule:
+    """Tests for kjvstudy_org.topics module"""
+
+    def test_get_all_topics(self):
+        """Test getting all topics"""
+        from kjvstudy_org.topics import get_all_topics
+
+        topics = get_all_topics()
+        assert isinstance(topics, dict)
+        assert len(topics) > 0
+
+    def test_get_topic_valid(self):
+        """Test getting valid topic"""
+        from kjvstudy_org.topics import get_all_topics, get_topic
+
+        all_topics = get_all_topics()
+        if all_topics:
+            topic_name = next(iter(all_topics.keys()))
+            topic = get_topic(topic_name)
+            assert topic is not None
+
+    def test_get_topic_invalid(self):
+        """Test getting invalid topic"""
+        from kjvstudy_org.topics import get_topic
+
+        topic = get_topic("not_a_real_topic_xyz123")
+        assert topic is None
+
+
+class TestStoriesRoutes:
+    """Tests for kjvstudy_org.routes.stories module"""
+
+    def test_stories_index_page(self, client):
+        """Test stories index page loads"""
+        response = client.get("/stories")
+        assert response.status_code == 200
+        assert "Stories" in response.text or "stories" in response.text.lower()
+
+    def test_stories_category_page(self, client):
+        """Test stories category page"""
+        from kjvstudy_org.stories import load_all_stories
+
+        categories = load_all_stories()
+        if categories:
+            slug = categories[0].get("slug")
+            if slug:
+                response = client.get(f"/stories/category/{slug}")
+                # Should return 200 or redirect
+                assert response.status_code in [200, 301, 302, 307, 404]
+
+    def test_stories_invalid_category(self, client):
+        """Test invalid category returns 404"""
+        response = client.get("/stories/category/not-a-real-category-xyz")
+        assert response.status_code == 404
+
+    def test_story_detail_page(self, client):
+        """Test individual story page"""
+        from kjvstudy_org.stories import get_all_stories_flat
+
+        stories = get_all_stories_flat()
+        if stories:
+            slug = stories[0].get("slug")
+            if slug:
+                response = client.get(f"/story/{slug}")
+                # Should return 200 or 404
+                assert response.status_code in [200, 404]
+
+    def test_story_invalid_slug(self, client):
+        """Test invalid story slug returns 404"""
+        response = client.get("/story/not-a-real-story-slug-xyz")
+        assert response.status_code == 404
+
+
+class TestReadingPlansModule:
+    """Tests for kjvstudy_org.reading_plans module"""
+
+    def test_get_all_plans(self):
+        """Test getting all reading plans"""
+        from kjvstudy_org.reading_plans import get_all_plans
+
+        plans = get_all_plans()
+        assert isinstance(plans, dict)
+        assert len(plans) > 0
+
+    def test_get_plan_by_id(self):
+        """Test getting reading plan by ID"""
+        from kjvstudy_org.reading_plans import get_all_plans, get_plan
+
+        plans = get_all_plans()
+        if plans:
+            plan_id = next(iter(plans.keys()))
+            plan = get_plan(plan_id)
+            assert plan is not None
+
+    def test_get_plan_invalid_id(self):
+        """Test getting reading plan with invalid ID"""
+        from kjvstudy_org.reading_plans import get_plan
+
+        plan = get_plan("not-a-real-plan-id-xyz")
+        assert plan is None
+
+    def test_get_plan_summary(self):
+        """Test getting plan summary"""
+        from kjvstudy_org.reading_plans import get_plan_summary
+
+        summary = get_plan_summary()
+        assert isinstance(summary, list)
+        assert len(summary) > 0
+        # Each item should have name and id
+        if summary:
+            assert "name" in summary[0] or "id" in summary[0]
diff --git a/uv.lock b/uv.lock
index fca4109..309782a 100644
--- a/uv.lock
+++ b/uv.lock
@@ -493,6 +493,7 @@ dev = [
 [package.dev-dependencies]
 dev = [
     { name = "pytest" },
+    { name = "pytest-cov" },
 ]
 
 [package.metadata]
@@ -511,7 +512,10 @@ requires-dist = [
 provides-extras = ["dev"]
 
 [package.metadata.requires-dev]
-dev = [{ name = "pytest", specifier = ">=8.3.5" }]
+dev = [
+    { name = "pytest", specifier = ">=8.3.5" },
+    { name = "pytest-cov", specifier = ">=7.0.0" },
+]
 
 [[package]]
 name = "markdown-it-py"