diff --git a/package-lock.json b/package-lock.json
index 344e022..ca753a4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "siteforge",
-  "version": "2.34.0",
+  "version": "2.35.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "siteforge",
-      "version": "2.34.0",
+      "version": "2.35.0",
       "dependencies": {
         "@aws-sdk/client-s3": "^3.1135.0",
         "@dnd-kit/core": "^6.3.1",
diff --git a/package.json b/package.json
index 92c49ed..9506112 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.34.0",
+  "version": "2.35.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/server/helpers.js b/server/helpers.js
index 0b66321..8e04c5c 100644
--- a/server/helpers.js
+++ b/server/helpers.js
@@ -344,6 +344,7 @@ function sanitizeStudies(value) {
       showOnHomepage: item.showOnHomepage === true,
       showNewTag: item.showNewTag === true,
       newTagLabel: typeof item.newTagLabel === 'string' ? item.newTagLabel.trim().slice(0, 24) : '',
+      guideSource: typeof item.guideSource === 'string' && /^(none|primary|second|book:[A-Za-z0-9_-]{1,80})$/.test(item.guideSource.trim()) ? item.guideSource.trim() : '',
       status: item.status === 'planned' ? 'planned' : (item.status === 'complete' ? 'complete' : 'active'),
       lane: item.lane === 'A' || item.lane === 'B' ? item.lane : '',
       startsAt: sanitizeIsoDate(item.startsAt),
diff --git a/src/AdminPage.tsx b/src/AdminPage.tsx
index ad2a768..0fd115c 100644
--- a/src/AdminPage.tsx
+++ b/src/AdminPage.tsx
@@ -6013,6 +6013,19 @@ const [dashboardNow, setDashboardNow] = useState(() => new Date())
                             <label htmlFor={`study-chapters-${activeStudy.id}`}>Number of Chapters</label>
                             <input id={`study-chapters-${activeStudy.id}`} type="number" min="1" max="999" value={activeStudy.numberOfChapters} placeholder="4" onChange={e => updateStudyProgram(activeStudy.id, 'numberOfChapters', Number(e.target.value) || 1)} />
                           </div>
+                          <div className="admin-field">
+                            <label htmlFor={`study-guide-source-${activeStudy.id}`}>Study Guide Download</label>
+                            <select id={`study-guide-source-${activeStudy.id}`} value={activeStudy.guideSource ?? ''} onChange={e => updateStudyProgram(activeStudy.id, 'guideSource', e.target.value)}>
+                              <option value="">Automatic (guide of the series or book linked to this study)</option>
+                              <option value="none">None — don&rsquo;t show a guide button</option>
+                              {form.studyGuideTitle && <option value="primary">Current series guide: {form.studyGuideTitle}</option>}
+                              {form.secondSeries?.guide?.title && <option value="second">Second series guide: {form.secondSeries.guide.title}</option>}
+                              {(form.finishedBooks ?? []).filter(b => b.guide?.title).map(b => (
+                                <option key={b.id} value={`book:${b.id}`}>{b.title}: {b.guide?.title}</option>
+                              ))}
+                            </select>
+                            <p className="admin-field-help">Adds a &ldquo;Download Study Guide&rdquo; button to this study&rsquo;s page. Visitors enter their name and email to get the file.</p>
+                          </div>
                           <div className="admin-field" style={{ display: 'flex', alignItems: 'center', gap: '0.6rem' }}>
                             <input id={`study-home-feature-${activeStudy.id}`} type="checkbox" checked={activeStudy.showOnHomepage === true} onChange={e => updateStudyProgram(activeStudy.id, 'showOnHomepage', e.target.checked)} />
                             <label htmlFor={`study-home-feature-${activeStudy.id}`}>Feature this study card on homepage</label>
diff --git a/src/content.ts b/src/content.ts
index 5eeae40..815a5fb 100644
--- a/src/content.ts
+++ b/src/content.ts
@@ -14,6 +14,9 @@ export interface StudyProgram {
   showOnHomepage?: boolean
   showNewTag?: boolean
   newTagLabel?: string
+  // Which companion guide the study offers for download: '' = automatic (the guide of the series or
+  // finished book linked to this study), 'none', 'primary', 'second', or 'book:<finished book id>'
+  guideSource?: string
   // 'complete' = finished and self-paced (still open for enrollment). A study whose lessons
   // have all been released is treated as complete even if left as 'active'.
   status: 'active' | 'planned' | 'complete'
@@ -700,3 +703,39 @@ export function getAllHighlights(content: Pick<SiteContent, 'podcastFeaturedLink
     ...(content.finishedBooks ?? []).flatMap(book => book.highlights ?? []),
   ]
 }
+
+export interface StudyGuideLink {
+  // Page id under /downloads/ (primary-guide, second-guide, book-guide--<id>)
+  pageId: string
+  title: string
+}
+
+// The companion guide a study offers, either chosen explicitly in admin or found through the
+// series / finished book that is linked to the study.
+export function getStudyGuideLink(
+  content: Pick<SiteContent, 'seriesStudySlug' | 'studyGuideTitle' | 'studyGuideUrl' | 'studyGuideDownloadUrl' | 'studyGuideAppleBooksUrl' | 'secondSeries' | 'finishedBooks'>,
+  study: Pick<StudyProgram, 'slug' | 'guideSource'>,
+): StudyGuideLink | null {
+  const source = study.guideSource ?? ''
+  if (source === 'none') return null
+
+  const primary = (): StudyGuideLink | null =>
+    content.studyGuideTitle && (content.studyGuideUrl || content.studyGuideDownloadUrl || content.studyGuideAppleBooksUrl)
+      ? { pageId: 'primary-guide', title: content.studyGuideTitle }
+      : null
+  const second = (): StudyGuideLink | null =>
+    content.secondSeries?.guide?.title ? { pageId: 'second-guide', title: content.secondSeries.guide.title } : null
+  const book = (id: string): StudyGuideLink | null => {
+    const found = (content.finishedBooks ?? []).find(b => b.id === id)
+    return found?.guide?.title ? { pageId: `book-guide--${found.id}`, title: found.guide.title } : null
+  }
+
+  if (source === 'primary') return primary()
+  if (source === 'second') return second()
+  if (source.startsWith('book:')) return book(source.slice('book:'.length))
+
+  if (content.seriesStudySlug && content.seriesStudySlug === study.slug) return primary()
+  if (content.secondSeries?.studySlug && content.secondSeries.studySlug === study.slug) return second()
+  const linkedBook = (content.finishedBooks ?? []).find(b => b.studySlug === study.slug && b.guide?.title)
+  return linkedBook ? book(linkedBook.id) : null
+}
diff --git a/src/studyPages.tsx b/src/studyPages.tsx
index a935a83..8f987c0 100644
--- a/src/studyPages.tsx
+++ b/src/studyPages.tsx
@@ -2,6 +2,7 @@ import { useEffect, useMemo, useRef, useState, useCallback } from 'react'
 import DOMPurify from 'dompurify'
 import { Link, useLocation, useNavigate, useParams } from 'react-router-dom'
 import type { SiteContent, StudyProgram, StudySection } from './content'
+import { getStudyGuideLink } from './content'
 import { DEFAULT_COLOSSIANS_STUDY_SECTIONS } from './legacyColossiansData'
 import { usePageMeta } from './hooks/usePageMeta'
 import { Breadcrumbs } from './components/Breadcrumbs'
@@ -1704,6 +1705,8 @@ export function ColossiansStudyIndexPage({ content }: Props) {
     }
   }
 
+  const studyGuide = getStudyGuideLink(content, study)
+
   return (
     <main className="study-index-page" aria-label={`${study.title} study`}>
       <section className="section-study-course-hero">
@@ -1740,6 +1743,7 @@ export function ColossiansStudyIndexPage({ content }: Props) {
                 {enrolling ? 'Enrolling...' : 'Enroll in This Study'}
               </button>
             )}
+            {studyGuide && <Link to={`/downloads/${studyGuide.pageId}`} className="btn-secondary">📄 Download Study Guide</Link>}
             {allLessonsDone && <Link to="/study/account" className="btn-secondary">🏅 My Certificate</Link>}
             {enrolled && <Link to={`/study/${study.slug}/notes`} className="btn-secondary">My Notes</Link>}
             {enrolled && studyStatus !== 'planned' && <Link to={`/study/${study.slug}/community`} className="btn-secondary">Community</Link>}