diff --git a/calibre-plugin/plugin-defaults.ini b/calibre-plugin/plugin-defaults.ini
index 9c83500a..4dd27ce0 100644
--- a/calibre-plugin/plugin-defaults.ini
+++ b/calibre-plugin/plugin-defaults.ini
@@ -709,7 +709,7 @@ extratags: FanFiction,Testing,HTML
 
 ## AO3 adapter defines a few extra metadata entries.
 ## If there's ever more than 4 series, add series04,series04Url etc.
-extra_valid_entries:fandoms,freeformtags,freefromtags,ao3categories,comments,kudos,hits,bookmarks,collections,series00,series01,series02,series03,series00Url,series01Url,series02Url,series03Url
+extra_valid_entries:fandoms,freeformtags,freefromtags,ao3categories,comments,kudos,hits,bookmarks,collections,series00,series01,series02,series03,series00Url,series01Url,series02Url,series03Url,series00HTML,series01HTML,series02HTML,series03HTML
 fandoms_label:Fandoms
 freeformtags_label:Freeform Tags
 freefromtags_label:Freeform Tags
@@ -719,6 +719,14 @@ kudos_label:Kudos
 hits_label:Hits
 collections_label:Collections
 bookmarks_label:Bookmarks
+series00HTML_label:Series
+series01HTML_label:Additional Series
+series02HTML_label:Additional Series
+series03HTML_label:Additional Series
+
+## Assume entryUrl, apply to "<a class='%slink' href='%s'>%s</a>" to
+## make entryHTML.
+make_linkhtml_entries:series00,series01,series02,series03
 
 ## AO3 doesn't have anything it calls 'genre'.  The adapter used to be
 ## hardcoded to include the site specific metadata freeformtags &
@@ -737,7 +745,7 @@ include_in_category:fandoms
 include_in_freefromtags:freeformtags
 
 ## adds to titlepage_entries instead of replacing it.
-#extra_titlepage_entries: fandoms,freeformtags,ao3categories,comments,kudos,hits,bookmarks,series00,series01,series02,series03,series00Url,series01Url,series02Url,series03Url
+#extra_titlepage_entries: fandoms,freeformtags,ao3categories,comments,kudos,hits,bookmarks,series01HTML,series02HTML,series03HTML
 
 ## adds to include_subject_tags instead of replacing it.
 #extra_subject_tags:fandoms,freeformtags,ao3categories
diff --git a/fanficfare/defaults.ini b/fanficfare/defaults.ini
index 998527d1..9e8c14b5 100644
--- a/fanficfare/defaults.ini
+++ b/fanficfare/defaults.ini
@@ -715,7 +715,7 @@ extratags: FanFiction,Testing,HTML
 
 ## AO3 adapter defines a few extra metadata entries.
 ## If there's ever more than 4 series, add series04,series04Url etc.
-extra_valid_entries:fandoms,freeformtags,freefromtags,ao3categories,comments,kudos,hits,bookmarks,collections,series00,series01,series02,series03,series00Url,series01Url,series02Url,series03Url
+extra_valid_entries:fandoms,freeformtags,freefromtags,ao3categories,comments,kudos,hits,bookmarks,collections,series00,series01,series02,series03,series00Url,series01Url,series02Url,series03Url,series00HTML,series01HTML,series02HTML,series03HTML
 fandoms_label:Fandoms
 freeformtags_label:Freeform Tags
 freefromtags_label:Freeform Tags
@@ -725,6 +725,14 @@ kudos_label:Kudos
 hits_label:Hits
 collections_label:Collections
 bookmarks_label:Bookmarks
+series00HTML_label:Series
+series01HTML_label:Additional Series
+series02HTML_label:Additional Series
+series03HTML_label:Additional Series
+
+## Assume entryUrl, apply to "<a class='%slink' href='%s'>%s</a>" to
+## make entryHTML.
+make_linkhtml_entries:series00,series01,series02,series03
 
 ## AO3 doesn't have anything it calls 'genre'.  The adapter used to be
 ## hardcoded to include the site specific metadata freeformtags &
@@ -743,7 +751,7 @@ include_in_category:fandoms
 include_in_freefromtags:freeformtags
 
 ## adds to titlepage_entries instead of replacing it.
-#extra_titlepage_entries: fandoms,freeformtags,ao3categories,comments,kudos,hits,bookmarks,series00,series01,series02,series03,series00Url,series01Url,series02Url,series03Url
+#extra_titlepage_entries: fandoms,freeformtags,ao3categories,comments,kudos,hits,bookmarks,series01HTML,series02HTML,series03HTML
 
 ## adds to include_subject_tags instead of replacing it.
 #extra_subject_tags:fandoms,freeformtags,ao3categories