Mus+ Audiobooks app for iPhone and iPad

Mus+Audiobooks lets you listen to your iPod Audiobooks with iPod Music simultanously. You plug your headphones, open the app and click the Play button. Your iPods favorite music plays simultanously with the audiobooks playlist that you compose from your songs.

YES, you will have two players playing simultanously, and this is what the whole app is about. You have two playlists: audiobooks playlist that you set inside this app and your normal playlist that you can set in iPod app from Apple. Of course the internal playlist saves automatically where you left the audiobook and resumes from the last place when you come back!