Does anyone have any book recommendations for a gifted young teen? My nephew is 13, and he recently blew the lid off of a school-administered IQ test.

For his birthday, I want to give him some books that will inspire him to achieve great things and live a happy life full of hard work. At the very least, I want to give him some good math and science books. He has already has taken algebra, geometry and introductory calculus, so he knows some math already.