Google Books allows you to search the full text of books and other resources such as magazines and newspapers. Some books are provided by publishers, while others are scanned as part of the Library Project. It can serve as a resource to learn about and browse titles pertinent to your research interests.
Books are displayed in Google Books using the below view types. These view types are based on a title's copyright and copyright owner.
Public domain books can be downloaded in EPUB and PDF format. See below for an example:
Search Google Play Books to access more than a million titles free in the public domain, including well-known classics.