Anonygoo

Smart AudioBook Player v1.9.7 Pro
Requirements: Android 2.2+
Overview: The program is designed specially for playing audio books.
Assumed that you have audiobooks and already copied them to your phone.

Features:
+ Playback speed control (requires Android 4).
+ Classification of books (new, started, finished).
+ Download cover from the Internet.
+ List of characters, makes it easier to follow the story.
+ Automatic pause in case you fall asleep. To continue playback just shake your phone.
+ Playback history.
+ Application Widget. Allows you to control the player from the home screen.
+ By specifying a root folder containing all your audiobook, you can exclude your folders which contains music and other audio files.
+ You don’t have to finish one book to start another. The progress is saved independently for all books.
+ NO ADS!
Many thanks to people who left comments and suggestions.
If you have something that doesn’t work please write an email instead of leaving a comment.

What’s in this version:
+Long press on book in Library to merge few folders of one book. For example Disk1, Disk2, Disk3.
+Settings->Full version features->Headset: double press
First press – play/pause.
Second press – rewind 10s.
+For people who prefer other Back button behavior:
Settings->Full version->Back Button: Minimize, Pause->Exit
+Left time in reading progress:
Settings->Full version->”first line”
+Added support of Playback speed control (*.mp3 only) for Android 2.
Settings->Advanced->Compatibility mode
This app has NO advertisements

https://play.google.com/store/apps/details?id=ak.alizandro.smartaudiobookplayer