This is an unhandy sort of book. You are, by anybody's math curriculum, a long way past cheating on your fingers when you can read this text. You are also probably a long way past the point when you'll be seen with a picture book format in your hands. Nevertheless, the book holds appeal for the precocious dilettante. It collects all the odd facts about numbers. It's good crossword puzzle information. For instance, fear of the number 13 is ""triskaidekaphobia"" and 31,536,000 seconds are the number of seconds in a year. And it's all very interesting to browse through even if all of it plus 15Â¢ will still, for the nonce, only get you a subway ride all over Manhattan.