As a certified bookworm, it was hard to limit myself to 3 books, but adhereing to the rules of the questions here are my 3 of the many favourites. In no particular order.
1. Crime and Punishment by Fyodor Dostoevesky
2. Desperately Seeking Paradise: Journey of a Sceptical Muslim by Sardar Ziauddin
3. Long walk to freedom by Nelson Mandela.