diff --git a/AAXtoMP3 b/AAXtoMP3
index e11650b..036dac9 100755
--- a/AAXtoMP3
+++ b/AAXtoMP3
@@ -537,8 +537,10 @@ save_metadata() {
     # put a ',' after the start value, we calculate the end of each chapter
     # as start+length, and we convert (divide) the time stamps from ms to s.
     # Then we delete all ':' and '/' since they make a filename invalid.
-    jq -r '.content_metadata.chapter_info.chapters[] | "Chapter # start: \(.start_offset_ms/1000), end: \((.start_offset_ms+.length_ms)/1000) \n#\n# Title: \(.title)"' "${extra_chapter_file}" \
-      | $SED 's@[:/]@@g' >> "$metadata_file"
+    jq -r '.content_metadata.chapter_info.chapters | reduce .[] as $c ([]; if $c.chapters? then .+[$c | 
+       del(.chapters)]+[$c.chapters] else .+[$c] end) | flatten | .[] |
+       "Chapter # start: \(.start_offset_ms/1000), end: \((.start_offset_ms+.length_ms)/1000) \n#\n# Title: \(.title)"' \
+       "${extra_chapter_file}" | $SED 's@[:/]@@g' >> "$metadata_file"
     # In case we want to use a single file m4b we need to extract the
     # chapter titles from the .json generated by audible–cli and store
     # them correctly formatted for mp4chaps in a chapter.txt