diff --git a/.github/workflows/update-book.yml b/.github/workflows/update-book.yml
index 491caa78e2..49e4203247 100644
--- a/.github/workflows/update-book.yml
+++ b/.github/workflows/update-book.yml
@@ -71,6 +71,8 @@ jobs:
         with:
           bundler-cache: true
       - name: update book/${{ matrix.language.lang }}
+        env:
+          GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           # this seems to be needed to let `bundle exec` see `vendor/bundle/`
           { bundle check || bundle install --frozen; } &&
@@ -85,6 +87,13 @@ jobs:
 
           # commit it all
           git add -A external/book &&
+          if ${{ inputs.force-rebuild == true && 'git diff-index --exit-code HEAD --' || 'false' }}
+          then
+            # Force the bundle to be non-empty
+            git fetch --depth 2 origin ${{ github.ref_name }} &&
+            git update-ref refs/remotes/origin/${{ github.ref_name }} HEAD^ &&
+            exit 0
+          fi &&
           git -c user.name=${{ github.actor }} \
             -c user.email=${{ github.actor }}@noreply.github.com \
             commit -m 'book: update ${{ matrix.language.lang }}' \
diff --git a/Gemfile b/Gemfile
index 3f3e40db8c..980ffe5c19 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,3 +8,5 @@ gem "rss"
 gem "asciidoctor", "~> 2.0.0"
 gem "nokogiri"
 gem "diffy"
+
+gem "base64", "~> 0.2.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 76d21e3c1a..15f7a25eb9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,6 +4,7 @@ GEM
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     asciidoctor (2.0.23)
+    base64 (0.2.0)
     diffy (3.4.3)
     faraday (2.12.2)
       faraday-net_http (>= 2.0, < 3.5)
@@ -58,6 +59,7 @@ PLATFORMS
 
 DEPENDENCIES
   asciidoctor (~> 2.0.0)
+  base64 (~> 0.2.0)
   diffy
   faraday-retry
   nokogiri
@@ -67,6 +69,7 @@ DEPENDENCIES
 CHECKSUMS
   addressable (2.8.7) sha256=462986537cf3735ab5f3c0f557f14155d778f4b43ea4f485a9deb9c8f7c58232
   asciidoctor (2.0.23) sha256=52208807f237dfa0ca29882f8b13d60b820496116ad191cf197ca56f2b7fddf3
+  base64 (0.2.0) sha256=0f25e9b21a02a0cc0cea8ef92b2041035d39350946e8789c562b2d1a3da01507
   diffy (3.4.3) sha256=4264b9e7db00d1cd426fcd32e36565779163cedc2340a95b0e6f025e71f9aaa7
   faraday (2.12.2) sha256=157339c25c7b8bcb739f5cf1207cb0cefe8fa1c65027266bcbc34c90c84b9ad6
   faraday-net_http (3.4.0) sha256=a1f1e4cd6a2cf21599c8221595e27582d9936819977bbd4089a601f24c64e54a
diff --git a/external/book/content/book/az/v2/_index.html b/external/book/content/book/az/v2/_index.html
index 3be6aec5ca..5069bcfb09 100644
--- a/external/book/content/book/az/v2/_index.html
+++ b/external/book/content/book/az/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit2-aze/progit2
   sha: 9f5e87d19b622e05fd9f7cc215bcd39c79d5995b
+  ebook_pdf: https://github.com/progit2-aze/progit2/releases/download/2.1.167/progit_v2.1.167.pdf
+  ebook_epub: https://github.com/progit2-aze/progit2/releases/download/2.1.167/progit_v2.1.167.epub
 page_title: Git - Book
 url: "/book/az/v2.html"
 aliases:
diff --git a/external/book/content/book/be/v2/_index.html b/external/book/content/book/be/v2/_index.html
index 6e5799cedf..b866ca6cb6 100644
--- a/external/book/content/book/be/v2/_index.html
+++ b/external/book/content/book/be/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-be
   sha: 5d7dee94e8f4f56fc28ef927e7435d869cd312ff
+  ebook_pdf: https://github.com/progit/progit2-be/releases/download/2.1.2/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-be/releases/download/2.1.2/progit.epub
 page_title: Git - Book
 url: "/book/be/v2.html"
 aliases:
diff --git a/external/book/content/book/bg/v2/_index.html b/external/book/content/book/bg/v2/_index.html
index 30fbbf0de1..8b21d06b8b 100644
--- a/external/book/content/book/bg/v2/_index.html
+++ b/external/book/content/book/bg/v2/_index.html
@@ -9,6 +9,9 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-bg
   sha: bad96055d9e17cb562781652a87df1de93ab2c9b
+  ebook_pdf: https://github.com/progit/progit2-bg/releases/download/2.1.60/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-bg/releases/download/2.1.60/progit.epub
+  ebook_mobi: https://github.com/progit/progit2-bg/releases/download/2.1.60/progit.mobi
 page_title: Git - Book
 url: "/book/bg/v2.html"
 aliases:
diff --git a/external/book/content/book/de/v2/_index.html b/external/book/content/book/de/v2/_index.html
index d3a994b17b..47593ac8d9 100644
--- a/external/book/content/book/de/v2/_index.html
+++ b/external/book/content/book/de/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-de
   sha: c4f0a32f55f41264c4c72aef9800b3bce306486e
+  ebook_pdf: https://github.com/progit/progit2-de/releases/download/2.1.293/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-de/releases/download/2.1.293/progit.epub
 page_title: Git - Book
 url: "/book/de/v2.html"
 aliases:
diff --git a/external/book/content/book/en/v2/_index.html b/external/book/content/book/en/v2/_index.html
index aed93767a8..787090106a 100644
--- a/external/book/content/book/en/v2/_index.html
+++ b/external/book/content/book/en/v2/_index.html
@@ -11,7 +11,6 @@
   sha: 3404a4f5e0c1faab3e89ae93d48663413b31dd8d
   ebook_pdf: https://github.com/progit/progit2/releases/download/2.1.443/progit.pdf
   ebook_epub: https://github.com/progit/progit2/releases/download/2.1.443/progit.epub
-  ebook_mobi: https://github.com/progit/progit2/releases/download/2.1.443/progit.mobi
 page_title: Git - Book
 url: "/book/en/v2.html"
 aliases:
diff --git a/external/book/content/book/es/v2/_index.html b/external/book/content/book/es/v2/_index.html
index c379f7aea9..a47c77b70e 100644
--- a/external/book/content/book/es/v2/_index.html
+++ b/external/book/content/book/es/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-es
   sha: 2264d131f4f6ca028ff4fe88ca60fc8384ee0c3c
+  ebook_pdf: https://github.com/progit/progit2-es/releases/download/2.1.23/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-es/releases/download/2.1.23/progit.epub
 page_title: Git - Book
 url: "/book/es/v2.html"
 aliases:
diff --git a/external/book/content/book/fr/v2/_index.html b/external/book/content/book/fr/v2/_index.html
index 4d67ed8687..b5b58eb7f5 100644
--- a/external/book/content/book/fr/v2/_index.html
+++ b/external/book/content/book/fr/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-fr
   sha: be26909d7508e6b2754965e7e5a75d3e44b81dbc
+  ebook_pdf: https://github.com/progit/progit2-fr/releases/download/2.1.77/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-fr/releases/download/2.1.77/progit.epub
 page_title: Git - Book
 url: "/book/fr/v2.html"
 aliases:
diff --git a/external/book/content/book/gr/v2/_index.html b/external/book/content/book/gr/v2/_index.html
index 7608e9c128..4fc12be1be 100644
--- a/external/book/content/book/gr/v2/_index.html
+++ b/external/book/content/book/gr/v2/_index.html
@@ -9,6 +9,9 @@
   front_page: true
   repository_url: https://github.com/progit2-gr/progit2
   sha: bddb5f3e050e3ab66d197eaab033e65a2aa98e03
+  ebook_pdf: https://github.com/progit2-gr/progit2/releases/download/2.1.4/progit_v2.1.4.pdf
+  ebook_epub: https://github.com/progit2-gr/progit2/releases/download/2.1.4/progit_v2.1.4.epub
+  ebook_mobi: https://github.com/progit2-gr/progit2/releases/download/2.1.4/progit_v2.1.4.mobi
 page_title: Git - Book
 url: "/book/gr/v2.html"
 aliases:
diff --git a/external/book/content/book/it/v2/_index.html b/external/book/content/book/it/v2/_index.html
index b7508f3844..cc8e3bd11c 100644
--- a/external/book/content/book/it/v2/_index.html
+++ b/external/book/content/book/it/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-it
   sha: '08e643e3d7391c7f503a9de7965bf5579fb9f727'
+  ebook_pdf: https://github.com/progit/progit2-it/releases/download/2.1.4/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-it/releases/download/2.1.4/progit.epub
 page_title: Git - Book
 url: "/book/it/v2.html"
 aliases:
diff --git a/external/book/content/book/ja/v2/_index.html b/external/book/content/book/ja/v2/_index.html
index a64692808b..05e33da8d6 100644
--- a/external/book/content/book/ja/v2/_index.html
+++ b/external/book/content/book/ja/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-ja
   sha: bfb44c39ca152442e1186b4e2913134bd9a0b1e7
+  ebook_pdf: https://github.com/progit/progit2-ja/releases/download/2.1.7/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-ja/releases/download/2.1.7/progit.epub
 page_title: Git - Book
 url: "/book/ja/v2.html"
 aliases:
diff --git a/external/book/content/book/ko/v2/_index.html b/external/book/content/book/ko/v2/_index.html
index eeb06e4387..c652271de1 100644
--- a/external/book/content/book/ko/v2/_index.html
+++ b/external/book/content/book/ko/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-ko
   sha: '0099163d19b4124ab13135dee7932b2cea6ec09b'
+  ebook_pdf: https://github.com/progit/progit2-ko/releases/download/2.1.80/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-ko/releases/download/2.1.80/progit.epub
 page_title: Git - Book
 url: "/book/ko/v2.html"
 aliases:
diff --git a/external/book/content/book/nl/v2/_index.html b/external/book/content/book/nl/v2/_index.html
index 234d161e73..40012af6e2 100644
--- a/external/book/content/book/nl/v2/_index.html
+++ b/external/book/content/book/nl/v2/_index.html
@@ -8,7 +8,9 @@
   language_code: nl
   front_page: true
   repository_url: https://github.com/progit/progit2-nl
-  sha: a81766ce9c37750b7d13fd6ef9bd5961605d619b
+  sha: a8d19c00fc6ed2da8cd400004638752ab1d9f735
+  ebook_pdf: https://github.com/progit/progit2-nl/releases/download/2.1.117/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-nl/releases/download/2.1.117/progit.epub
 page_title: Git - Book
 url: "/book/nl/v2.html"
 aliases:
diff --git a/external/book/content/book/pl/v2/_index.html b/external/book/content/book/pl/v2/_index.html
index cbace7c842..0a38bcc9a5 100644
--- a/external/book/content/book/pl/v2/_index.html
+++ b/external/book/content/book/pl/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit2-pl/progit2-pl
   sha: 3a939c84461d254478a87749d43bed97ada37602
+  ebook_pdf: https://github.com/progit2-pl/progit2-pl/releases/download/2.1.1/progit.pdf
+  ebook_epub: https://github.com/progit2-pl/progit2-pl/releases/download/2.1.1/progit.epub
 page_title: Git - Book
 url: "/book/pl/v2.html"
 aliases:
diff --git a/external/book/content/book/pt-br/v2/_index.html b/external/book/content/book/pt-br/v2/_index.html
index 1954121886..5988707aaa 100644
--- a/external/book/content/book/pt-br/v2/_index.html
+++ b/external/book/content/book/pt-br/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-pt-br
   sha: e30df8c08716f41756134ffb39b25e9fb34909ac
+  ebook_pdf: https://github.com/progit/progit2-pt-br/releases/download/2.1.48/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-pt-br/releases/download/2.1.48/progit.epub
 page_title: Git - Book
 url: "/book/pt-br/v2.html"
 aliases:
diff --git a/external/book/content/book/ru/v2/_index.html b/external/book/content/book/ru/v2/_index.html
index 3070a4eaf2..e4af751181 100644
--- a/external/book/content/book/ru/v2/_index.html
+++ b/external/book/content/book/ru/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-ru
   sha: 79a75ed52f39247873bf2d8ffd7ed08706487755
+  ebook_pdf: https://github.com/progit/progit2-ru/releases/download/2.1.117/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-ru/releases/download/2.1.117/progit.epub
 page_title: Git - Book
 url: "/book/ru/v2.html"
 aliases:
diff --git a/external/book/content/book/sl/v2/_index.html b/external/book/content/book/sl/v2/_index.html
index ba5428b9d1..9ed2484f68 100644
--- a/external/book/content/book/sl/v2/_index.html
+++ b/external/book/content/book/sl/v2/_index.html
@@ -8,7 +8,9 @@
   language_code: sl
   front_page: true
   repository_url: https://github.com/progit/progit2-sl
-  sha: 16dcf83d9eaa6256fd962b6652f30d6b767f40a1
+  sha: '096aaf52e250ec1c5a8e47ea147dc79e797ade70'
+  ebook_pdf: https://github.com/progit/progit2-sl/releases/download/2.1.78/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-sl/releases/download/2.1.78/progit.epub
 page_title: Git - Book
 url: "/book/sl/v2.html"
 aliases:
diff --git a/external/book/content/book/sr/v2/_index.html b/external/book/content/book/sr/v2/_index.html
index 323260c62d..f486b421b9 100644
--- a/external/book/content/book/sr/v2/_index.html
+++ b/external/book/content/book/sr/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-sr
   sha: d3a3670c50e4cd21c2828333f712b6eacaa7e10f
+  ebook_pdf: https://github.com/progit/progit2-sr/releases/download/2.1.3/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-sr/releases/download/2.1.3/progit.epub
 page_title: Git - Book
 url: "/book/sr/v2.html"
 aliases:
diff --git a/external/book/content/book/uk/v2/_index.html b/external/book/content/book/uk/v2/_index.html
index c66b32a949..c677f6e9f9 100644
--- a/external/book/content/book/uk/v2/_index.html
+++ b/external/book/content/book/uk/v2/_index.html
@@ -9,6 +9,8 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-uk
   sha: d6bfd53e83b526f3d497983bfb784f4c832b1f9a
+  ebook_pdf: https://github.com/progit/progit2-uk/releases/download/2.1.12/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-uk/releases/download/2.1.12/progit.epub
 page_title: Git - Book
 url: "/book/uk/v2.html"
 aliases:
diff --git a/external/book/content/book/zh-tw/v2/_index.html b/external/book/content/book/zh-tw/v2/_index.html
index 22338e7dad..f6707d4eaa 100644
--- a/external/book/content/book/zh-tw/v2/_index.html
+++ b/external/book/content/book/zh-tw/v2/_index.html
@@ -9,6 +9,9 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-zh-tw
   sha: f0a989f9aaf289c265cf95381b30653a9d04819b
+  ebook_pdf: https://github.com/progit/progit2-zh-tw/releases/download/2.1.0/progit_v2.1.0.pdf
+  ebook_epub: https://github.com/progit/progit2-zh-tw/releases/download/2.1.0/progit_v2.1.0.epub
+  ebook_mobi: https://github.com/progit/progit2-zh-tw/releases/download/2.1.0/progit_v2.1.0.mobi
 page_title: Git - Book
 url: "/book/zh-tw/v2.html"
 aliases:
diff --git a/external/book/content/book/zh/v2/_index.html b/external/book/content/book/zh/v2/_index.html
index 3cf9c46b3c..4580107461 100644
--- a/external/book/content/book/zh/v2/_index.html
+++ b/external/book/content/book/zh/v2/_index.html
@@ -9,6 +9,9 @@
   front_page: true
   repository_url: https://github.com/progit/progit2-zh
   sha: a5267dfdbf4985d6b2bb94b0993007736fa0acbf
+  ebook_pdf: https://github.com/progit/progit2-zh/releases/download/2.1.73/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-zh/releases/download/2.1.73/progit.epub
+  ebook_mobi: https://github.com/progit/progit2-zh/releases/download/2.1.73/progit.mobi
 page_title: Git - Book
 url: "/book/zh/v2.html"
 aliases:
diff --git a/external/book/sync/book-nl.sha b/external/book/sync/book-nl.sha
index 02e4af88fb..eef1dad2b7 100644
--- a/external/book/sync/book-nl.sha
+++ b/external/book/sync/book-nl.sha
@@ -1 +1 @@
-a81766ce9c37750b7d13fd6ef9bd5961605d619b
+a8d19c00fc6ed2da8cd400004638752ab1d9f735
diff --git a/external/book/sync/book-sl.sha b/external/book/sync/book-sl.sha
index ac78c50e62..37c6034046 100644
--- a/external/book/sync/book-sl.sha
+++ b/external/book/sync/book-sl.sha
@@ -1 +1 @@
-16dcf83d9eaa6256fd962b6652f30d6b767f40a1
+096aaf52e250ec1c5a8e47ea147dc79e797ade70
diff --git a/script/update-book2.rb b/script/update-book2.rb
index 7fdea6b5d6..dac42c1e32 100644
--- a/script/update-book2.rb
+++ b/script/update-book2.rb
@@ -138,7 +138,7 @@ def genbook(language_code, &get_content)
       xlink = html.scan(/href="1-.*?\.html\#(.*?)"/)
       xlink&.each do |link|
         xref = link.first
-	book.xrefs[xref] = 'redirect-to-en' if !book.xrefs[xref]
+        book.xrefs[xref] = 'redirect-to-en' if !book.xrefs[xref]
         begin
           html.gsub!(/href="1-.*?\.html\##{xref}"/, "href=\"{{< relurl \"#{book_prefix}ch00/#{xref}\" >}}\"")
         rescue StandardError
@@ -155,7 +155,7 @@ def genbook(language_code, &get_content)
           footnotes.add(xref)
           next
         end
-	book.xrefs[xref] = 'redirect-to-en' if !book.xrefs[xref]
+        book.xrefs[xref] = 'redirect-to-en' if !book.xrefs[xref]
         begin
           html.gsub!(/href="\##{xref}"/, "href=\"{{< relurl \"#{book_prefix}ch00/#{xref}\" >}}\"")
         rescue StandardError
@@ -222,7 +222,7 @@ def genbook(language_code, &get_content)
       # record all the xrefs
       sec.search(".//*[@id]").each do |id|
         id_xref = id.attribute("id").to_s
-	book.xrefs[id_xref] = csection if !id_xref.start_with?('_footnoteref_')
+        book.xrefs[id_xref] = csection if !id_xref.start_with?('_footnoteref_')
       end
 
       section += 1
@@ -239,6 +239,24 @@ def genbook(language_code, &get_content)
   book
 end
 
+# Update just the download data, based on the latest tag in the repository
+def update_downloads(book, repo, octokit)
+  begin
+    rel = octokit.latest_release(repo)
+    get_url = lambda do |name_re|
+      asset = rel.assets.find { |asset| name_re.match(asset.name) }
+      asset&.browser_download_url
+    end
+    book.ebook_pdf  = get_url.call(/\.pdf$/)
+    book.ebook_epub = get_url.call(/\.epub$/)
+    book.ebook_mobi = get_url.call(/\.mobi$/)
+  rescue Octokit::NotFound
+    book.ebook_pdf  = nil
+    book.ebook_epub = nil
+    book.ebook_mobi = nil
+  end
+end
+
 # Generate book html directly from remote git repo
 def remote_genbook2(language_code)
   @octokit = Octokit::Client.new(access_token: ENV.fetch("GITHUB_API_TOKEN", nil))
@@ -269,20 +287,7 @@ def remote_genbook2(language_code)
 
     book.sha = repo_head.sha
 
-    begin
-      rel = @octokit.latest_release(repo)
-      get_url = lambda do |name_re|
-        asset = rel.assets.find { |asset| name_re.match(asset.name) }
-        asset&.browser_download_url
-      end
-      book.ebook_pdf  = get_url.call(/\.pdf$/)
-      book.ebook_epub = get_url.call(/\.epub$/)
-      book.ebook_mobi = get_url.call(/\.mobi$/)
-    rescue Octokit::NotFound
-      book.ebook_pdf  = nil
-      book.ebook_epub = nil
-      book.ebook_mobi = nil
-    end
+    update_downloads(book, repo, @octokit)
 
     book.save
   rescue StandardError => e
@@ -300,12 +305,16 @@ def local_genbook2(language_code, worktree_path)
       raise e
     end
     book.sha = `git -C "#{worktree_path}" rev-parse HEAD`.chomp
-    if language_code == 'en'
+    access_token = ENV.fetch("GITHUB_API_TOKEN", nil)
+    if access_token && Book.all_books[language_code]
+      @octokit = Octokit::Client.new(access_token:)
+      update_downloads(book, Book.all_books[language_code], @octokit)
+    elsif language_code == 'en'
       latest_tag = `git -C "#{worktree_path}" for-each-ref --format '%(refname:short)' --sort=-committerdate --count=1 refs/tags/`.chomp
       if latest_tag.empty?
         puts "No tag found in #{worktree_path}, trying to fetch tags"
         latest_tag = `git -C "#{worktree_path}" fetch --tags origin && git -C "#{worktree_path}" for-each-ref --format '%(refname:short)' --sort=-committerdate --count=1 refs/tags/`.chomp
-	raise "Still no tags in #{worktree_path}?" if latest_tag.empty?
+        raise "Still no tags in #{worktree_path}?" if latest_tag.empty?
       end
       book.ebook_pdf = "https://github.com/progit/progit2/releases/download/#{latest_tag}/progit.pdf"
       book.ebook_epub = "https://github.com/progit/progit2/releases/download/#{latest_tag}/progit.epub"