FOR those who have spent years achieving a sketchy knowledge of French while their mathematical abilities are even more cursory, the idea of learning Icelandic in a week and reciting pi to 22,514 decimal places must be completely mind blowing. But Daniel

FOR those who have spent years achieving a sketchy knowledge of French while their mathematical abilities are even more cursory, the idea of learning Icelandic in a week and reciting pi to 22,514 decimal places must be completely mind blowing.

But Daniel Tammet takes that in his stride. He has Asperger's syndrome - a kind of autism - and is a savant, which means he possesses extraordinary abilities but finds normal life a challenge. His world is made up of colours and numbers that enfold, enlighten and protect him.

But Daniel is also articulate and, through his eyes, scientists are exploring the way the brain works. His book is intriguing and leaves one thinking quite differently about the most mundane things.

Thanks to David's Bookshop, Letchworth.

4/5