How to get free textbooks

Never buy a texbook again! Here's 10 websites you can get them for free:
1. textbooknova.com
2. ebookee.org
3. manybooks.net
4. feedurbrain.com
5. alleng.ru
6. 2020ok.com
7. freetextbook.com
8. gutenberg.org
9. eknigu.com
10. en.bookfi.org