Modern times, modern ways of learning. Nowadays, people tend to learn from e-book rather than real paper book. Although e-books are so convenient, most of them are not free. You still need to buy the e-books. The only difference is that you don't have to go out to buy a book from a bookshop. You pay for the e-book and the e-book can be e-mailed to you or you can download it and access it through a code that let you get the full download contents.
You might think that there sites offering freeware download, are there sites that offer free e-books where we don't have to spend any money and download it free? Well, that's a good question. There is a website called Project Gutenberg, where all the e-books are ready to download for free. The site was established and operated by volunteers all over the world. Although all the e-books are free, they still require your donation to keep it their project going on.