I don’t listen to audiobooks to know any good titles, but sites that sell book bundles also usually have audiobook bundles, so maybe they’re a good starting point for finding titles?
Also, if you use Spotify, I can presume you’re at least not overly against DRM, so maybe you’d be interested in Storytel? Came across it a while back and people seemed to talk well of it, apparently being a subscription-based streaming, but didn’t look for further info on it as I saw it is “DRM’d”.
Copypasta of my comment in the post in the F-Droid community:
Chrono is extremely good for me, given often having to have alarms in the oddest of times, and it allowing me to schedule alarms as one-time only, daily, for specific weekdays, for specific dates, or for date ranges, as well as having the options to force to work in the background if lack of memory in the phone kills it.
As for alternatives I wish I could find, Librera Reader is still the best ebook reader I found outside of Google Play, but I could use it having better controls. Might even take the dust off my PS Vita to read ebooks, as I abhor touch controls due to them usually not being optimized for either precision or view space available (even on-screen controls might help), and on the Vita I can use the physical controls to move the ebooks’ pages around.