Several e-book platforms require the use of Adobe Digital Editions to download and borrow an e-book.
To download Adobe Digital Editions, you will need to install it on the Yard from the Software Center. This link will take you there.
When you try to download an e-book from one of these databases, you may see a message like this one:

1. If you have not already done so, install Adobe Digital Editions from the Software Center (NOT from one of the links in the pop-up message).
2. Proceed with the download.