Yes!
Project Gutenberg is an organization that digitizes and distributes eBooks that are out of copyright and are free of charge as a result.
To find Project Gutenberg books through Overdrive or Libby, click or tap on the magnifying glass icon, enter the words "Project Gutenberg" in the search box, and click or tap on SEARCH. Here is a link to the list of Project Gutenberg titles available through OverDrive.
This Overdrive collection of Project Gutenberg books is not the full collection of these books. There are many more! To find more Project Gutenberg books, we suggest searching the main Project Gutenberg website (or the mobile version).
If you search the mobile version, you can download and open Project Gutenberg files in your OverDrive app! Just search the site, download the EPUB (with or without images), and choose "OPEN IN..." > "OPEN IN OVERDRIVE". Here are some screenshots that show how to find and download content to your OverDrive app using the mobile Project Gutenberg site:
Note: Only Project Gutenberg books downloaded through OverDrive will work in the Libby app.