I like Talefish and it's directory based approach, but I feel the complexity or the ambition behind the project is killing it.

The Slumber companion doesn't work on Xperia X and Xperia 10 III. Sailfish 4.5. It only succeeds at stopping itsself.

Talefish lacks features that make audiobook players attractive:
-the M4A book chapter recognition features that the Android / Apple alternatives offer.
-the possibility for bookmarks and notes

Using it as it is but the lack of sleep timer is tough in my user scenario. Anyway many thanks for your effort to bring decent essential software to this platform.