eBooks and audiobooks from eMediaLibrary can now be borrowed for up to 21 days. The new option is listed when you go to checkout an item. (14 is the default, and 7 is the other option).
While you may enjoy the longer checkout period for certain items, you may want to return finished items sooner depending on your device and the content type. You can use your device's app, Adobe Digital Editions and/or Overdrive Media Console to return items. Usually this is done by clicking or tapping on an item, and then choosing to return and/or delete.
For more info, ask a trusty librarian or find your device on the Overdrive help page.