Worldwide, there are fewer than 50 living savants, those autistic individuals who can perform miraculous mental calculations or artistic feats. (Think Dustin Hoffman's character in Rain Man.) Until now, none of them has been able to discuss his or her thought processes, much less write a book. Daniel Tammet is the first.

Tammet's problems were apparent from childhood. He was shunned by his classmates and often resorted to rocking and humming quietly. Yet he could memorize almost anything, and his math and language skills were astonishing. By high school, Daniel was diagnosed as autistic, and he began to discover his own superhuman abilities: calculating huge sums in his head in seconds, learning new languages in one week, and memorizing more than 22,000 digits of pi.

With heart-melting simplicity and astonishing self-awareness, Born on a Blue Day tells Daniel's story: from his childhood frustrations to adult triumphs, while explaining how his mind works. He thinks in pictures. He sees numbers as complex shapes: 37 is lumpy like porridge; 89 reminds him of falling snow. Today, Daniel has emerged as one of the world's most fascinating minds and inspiring stories. His brain has amazed scientists for years, and everyone will be moved by his remarkable life story.