I was having some issues with this app, especially after the GB update. Make sure you have the most recent version, and make sure it's not been moved to your SD card. I know that's an option for saving memory and all, but this app doesn't work as well when it's running from the SD card. Also, there was an update for Audible not long after the GB update that did fix a lot of the issues, however just updating the app didn't seem to be enough. I actually uninstalled it and reinstalled it and it worked A LOT better. I'm pretty sure I didn't have to redownload my books, I'm not guaranteeing that though. Oh and clear the Cache periodically.