macOS/iOS - Apple Books app for audio books [-]

I'm using macOS 11 Big Sur. Apple Books does an ok job for books. For audio books:

* Audio books are not synced via iCloud, though that makes sense since audio books can be 1 GB by themselves.
* Unlike for regular books, audio book info cannot be edited in Books app. (On iOS you can't list and see metadata which means also can't edit it.)
* It shows current chapter and chapter timings (time since start, time to end) but not timings for the whole book. On iOS each part is a file (Audible books can be downloaded as 2 to 4 parts or 1 complete file) which makes it easier for coarse navigation.
* Speaking of which, on Books app you can forward/back per chapter which is tedious if you want to go from the end to the beginning.

In terms of playing experience in both you can skip forward/back 15 seconds, scrub within a chapter, or go forward/back a chapter (or book part in iOS). You can change playback speed from x0.75 to x2 in 0.25 increments. You can set a sleep timer so that it will stop playing after a while.

For me editing info is the big problem. Without it it's hard to organize audio books. For Audible books I ended up:

1. Record to GarageBand (you need loopback software since GarageBand doesn't record system audio).
2. Export to Music app (which no longer reads Audible files natively)
3. Edit metada in Music including adding cover art.
4. Go to Finder and drag Music files to Books app (you lose chapter info this way)

And if I need to re-edit metadata I can show Books files in Finder then drag to Music for editing.