I saw a piece of a BBC documentary about a British savant, Daniel Tammet, and was fascinated, since contrary to the character of Rain Man in the film, Danil was able to explain his capabilities, and observe the functioning of his brain. I picked up his book straight away when I saw it and read it quickly:

A very endearing and clear narrative that tells the childhood and growing into adult life of the author, an extraordinarily gifted person who is able to overcome the challenges of his autism. The observations that he makes about his own emotions, or lack of, are very illuminating, and the planning of interactions is a real study of self-consciousness!