8.4 ruined my audiobooks using. EXPLAIN!

Before iOS 8.4 I was using Music app to listen to my audiobooks. AND I WAS PERFECTLY FINE WITH THAT.

I had some Russian audiobooks on CDs. I copied them to my Mac, bound them into single m4b files with AudioBookFinder and organized them on iTunes, so I could sync them to my iPhone. And then 8.4 happened and forced them into iBooks out of Music. And now I cannot see my audiobooks as m4b files!!!

Let me explain:

Here you can see one of my audiobooks. I bound it as 11 separate m4b files because those are 11 separate stories. They are still organized under one title/album to keep everything in order.

Back then I used Music app, I could see them the way I see them in i Tunes: 11 long tracks.

Now, with 8.4 and compulsory utilization of iBooks as only mean to listen to audiobooks, whenever I want to choose one of those files, I get this lovely image straight to my face from my iPhone:

WHAT. THE ACTUAL. HAY?! How am I supposed to remember which story starts from what track?! Why IN THE HOLY NAME OF HAY I can't see the m4b files?!

How do I set up iBooks so I could get my m4b tracks back instead of "Track 1,..."?

If the answer is "You don't, cause you can't", then this update is officially a failure!