"As a teacher and Education Inspector in England I would rate this book very highly. It is extremely well written and brings to life mathematics. It is a way of making Maths appear fun. It is full of many useful insights. I found out about it on the Amazon web site - the reviews and comments there are extremely favourable. For me this was an excellent find. This is a site well worth visiting."

"I found this book in hardback version in a remaindered-books' store (that is, new books but sold at cost), and since I buy all books on mathematics and it was filed under 'maths and science' I decided to purchase it. I wouldn't call it a book on mathematics; rather a book on the intricacies of arithmetic (and specifically, as its name implies, number 9). I found out more about this number than I ever thought it was possible to know. The writer is clearly fascinated by the minutie of numbers and this comes across very clearly. I would recommend it to any recalcitrant youngster to break down a mathphoia since it does shed light on arithmetic in a fascinating and appealing way."

"A meditation on casting out nines. The author manages to massage the same pieces of "gee whiz" arithmetic into several guises. There is much repetition and a very forced half-baked Siddhartha style plot."

Hello, my name is Cláudio Jordão. I've been interest in these subject for a while, and in this book I found some motivation to continue with my "personal" investigation. I like very much the chapter about the Fibonacci-sequence and the Golden-number, and I think I might have something to add to this great "story". I cannot find any information about this on the web... maybe you can help me... My investigation is about, a cyclic sequence of numbers, inside the infinite Fibonnaci sequence. I would like to contact Cecil Balmond, but I dont have his e-mail. Thank you.