Please support kindle books

The app works well.But Voice are definitely out of sync in long ms word.Several suggestions are put forward.

1.Please support reading azw3/mobi/epub books and make the app display contents of the book so that listeners can select the chapter.

2.please Provide male voice for chinese.

3.Please support listening to books While listening to music as background sound.

yqwyqwyqw_yqw about Text to Speech - Speaky