This is a great book in which Deepak Chopra gives a vivid description of how one Siddhartha became Buddha. It starts from the point where Queen Maya gives birth to Siddhartha and Chopra takes us through the incidents that dot Siddhartha's life that eventually transform him into Buddha. As the title of the book goes, it talks about how Buddha achieved enlightenment. A must read if you are in to philosophy and religious reading.