iTunes 12.7.4 audiobooks scrambled grid view

Hmm, View as Author by Author wouldn't have required changing any tags. Mixed in a field for multiple items tells you that they are not all the same. It looks from here as if you have overwritten the track names with the value author? What did you actually do? Do you have Time Machine or some other active backup running so you can restore the original versions of these tracks?

tt2

Great, once you've restored the tracks you'll need to step through them to get iTunes to re-read the tags, unless you restore an appropriately timed version of the database too.

My script adjusts the Sort Name value of each selected track, leaving other properties alone. Each item is given a distinct value that groups and sorts in the correct order. You could potentially make 56 individual edits by hand, but it would be dull.

tt2

See Organizing audiobook chapters to tidy up the view in the current build, or see iTunes for Mac installers if you really want to try reverting to 12.7.1.

tt2