+ If you have the full version, you can long press on the button of the list of started books in the upper left corner of the player window and choose to sort started books by path or by recently played.
+ Added Settings--Playback--Stop when others are playing.
It allows you to simultaneously playback with other media players.
+ Long press the ID3 button at the top of the player window to save the current value as the default value for all new books.