Free Ebooks Project Gutenberg :
I have seen a fair few free Ebooks from amazon, a few of these are actually free anyway as they are so old they are not copywrite protected and have become public domain.
This project aims to provide these books free to all ( free of charge and free as in freedom)
Better explained here:
Hope this helps some avid readers and maybe some students starting English literature courses.
The project accepts donations for those feeling kind too.