Review Excerpt: This interactive book mixes clearly written middle and high school level reading with 71 interactive, embedded and finger-driven math demonstrations. As a result, this is a math book that you touch as well as read. The text comes from 23 articles written by Ian Stewart, a math professor. Those seeking a challenge can try to solve the 15 puzzles (with illustrated answers). The main menu presents eight large dots; each representing color-coded chapters as follows: Primes, Secret Codes, Polygons, Infinity, pi, Factorials, Music and Nature. Subscribers, please log into our database using your password to read the full review along with our rating, and see why this received our Editor’s Choice Award.