according to http://www.thetoptens.com
1. The Bible
2. The Hobbit – J. R. R. Tolkien 

3. Harry Potter and the Deathly Hallows – J. K. Rowling

4. The Lord of the Rings – J. R. R. Tolkien

5. The Hunger Games – Suzanne Collins 

6. Diary of a Wimpy Kid – Jeff Kinney 

7. The Great Gatsby – F. Scott Fitzgerald 

8. 1984 – George Orwell 

9. The Catcher in the Rye – J. D. Salinger
10. Catching Fire – Suzanne Collins