As a hungry Book reader, I download a lot of e-book from internet. Some times we call it digital copy of book.
Do you think it is illegal? No. It is 100% free legally.
Let me show you the site first.
There are over 20,000 free books in the Project Gutenberg Online Book Catalog.
A grand total of over 100,000 titles is available at Project Gutenberg Partners, Affiliates and Resources.
If you don't live in the United States, please check the copyright laws of your country before downloading or redistributing a book.
You can download it into your palm or smartphone to read it anywhere.
Most of them are located in Public Domain. So free to copy.
Ok, There is another site provide audio book to listen.
Go there to download some and have fun when reading and listening.