The listing, "Born On A Blue Day" autobio of the Pi guy has ended.
Written by a gifted autistic savant, Daniel Tammet -- he was the guy who memorized the value of pi to over 22,000 digits. A fascinating account through his own eyes of how he experiences numbers with something called synthesia. Synthesia is when more than one sense is involved in relating to a physical or mental image of something, in his case, numbers. For example, prime numbers look very different from ordinary numbers in his mental landscape.