Search for books that have been digitized by Google.
Q: Can I see a preview of the book?
A: If the book is out of copyright, or if the publisher has given permission, you'll be able to see a preview of the book, and in some cases, the entire text.
Q: Am I able to download the entirety of some eBooks?
A: If the title is in the public domain, you're free to download a PDF copy.