You will not usually need to "return" an ebook; most ebooks automatically return when the loan period ends. If the resource is only available under a one-user-at-a-time license, however, here's what you should do:

• Log out of your account in Moodle, or quit your current web browser.
• Alternatively, if you downloaded the edition into Adobe Digital Editions, right-click the item you want to return and select "Return Borrowed Item".