Renewal Now an Option in Overdrive
You may be seeing the new Overdrive renewal feature pop up in your Bookshelf.
How Overdrive Renewal Works
If your checkout can be renewed (there are no holds on it) three days prior to the due date, you'll get a green renew symbol. If the title can't be renewed the symbol will be grayed out.
The Overdrive renewal process puts you into the queue to checkout the book for a second time. When your first checkout expires, you'll receive an email notification letting you know it's time to borrow the item again. The renew feature can be used one time with each checked out title that is eligible for renewal.
Find detailed detailed instructions about renewing Overdrive titles at How to Renew Digital Titles.