With the OverDrive service (Library2Go/Libby), you can renew it as long as no one else is waiting for it. If someone is waiting on the hold list for it, you will be put back on the hold list for it when you request it again and notified when it is available. More information on how to do this can be found here: help.overdrive.com/customer/en/portal/articles/1481523-how-to-renew-digital-titles?b_id=15211.
