This is a list of chapterbook publications, in sections. Many of these will need adjustment now that full chapterbook support (as to entry at least, and at least partial display support) have been implemented/restored.
As a rule, there should be at least three related records involved in any Chpaterbook: a CHAPTERBOOK title record, which will be common to all publications of the chapterbook; a CHAPTERBOOK publication record, one for each pub; and a shortfiction title record, which will be common to all chapterbook publications, and to all reprints of the same story in collections, anthologies, magazines, etc.
Most of the cleanup involves adding a Chapterbook title record to a publication that already has a chapterbook publication record, and a shortfiction title record. Afterwords, merges of chapterbook titles are often required. But some cases do not follow this pattern.