Download free educative ebook from the internet

I came across a website called http://www.floodle.net and

powered by free-ebooks.net

These are places you can download free ebooks on any topic online without paying a dime to anyone. Just go to the site by clicking the link and get your ebooks downloaded to your computer FREE! Though most of those ebooks are in zip format. You can as well use 7zip to unzip the books and read. Some of the books came with resell rights. You just go and explore the site.