Anybody read or even heard of this guy? If not he is most famous for reciting the value pi to 50,000 (I think) decimal places from memory. He is an autistic savant and is able to perceive numbers as 3d objects. The way our brains connect the word giraffe to other words such as "long," "neck" and "animal," his brain does the same with numbers. The book is his point of view of how his brain works and cites various neurological studies. Its a great read.