Have a look at this video tutorial that shows how to download books from within ReadMe!.
Please note that the resources linked to inside ReadMe! are actually book websites that are not affiliated with ReadMe!. We put some links in ReadMe! to make it easier to quickly find some public domain books to read. We cannot answer any questions regarding these resources, but we have tested to download free books from all of the resources listed and we think they are all pretty good.
You can also go to any website within ReadMe!, using the address bar, making it possible for you to go on google.com or any other site and search for Epub books!