If you finish a title early, you can return both eBooks and audiobooks before the end of the lending period using OverDrive for Windows Phone 8.
How to return an eBook or audiobook
- From the app bookshelf, tap and hold the title you want to return.
Tap return / delete to display the return options.
Tap Return then Delete to return the title to the library and remove it from your device.
Tap Delete only to delete the title from your device. You will still have it checked out.