My wife reads a lot of books using Overdrive to access the Library Systems both here in Havasu and WA. Well Overdrive has a problem with IOS 7. The work around if anyone uses Overdrive is too uninstall Overdrive on your mobile device and then reinstall it. I did it through iTunes. The issue affects all the Apple Mobile devices.
Here are the instructions for any overdrive users: http://overdriveblogs.com/library/2013/09/19/overdrive-media-console-ios-7-crash-resolutions/?utm_source=feedburner&utm_medium=feed&utm_campaig n=Feed%3A+OverdrivesDigitalLibraryBlog+(OverDrive' s+Digital+Library+Blog)