IN CODE: A Mathematical Journey

At 16, Flannery made worldwide headlines as Ireland's 1999 Young Scientist of the Year for her discovery and presentation of the Cayley-Purser algorithm, an innovative encryption system roughly 22 times faster than the worldwide standard RSA algorithm. She declines the "genius" label, and a method for cracking her algorithm has since been discovered, but this only makes the book more interesting and unpredictable. It's more about the journey's adventure than the destination and less about Sarah's specialness than her spirit. The mix is part memoir, part puzzle book and part mathematical exploration, with scattered bits of mathematical lore. (The heaviest math is concentrated into two chapters and the appendices, leaving the remainder easy going for the fainthearted.) The puzzle-solving approach to math cultivated by her father (and coauthor) encourages exploration, an adventurous attitude, attention to concepts more than calculations and sheer enjoyment of taking on a challenge. It's also more egalitarian than proof-based approaches, giving newcomers a more equal footing with old pros, emphasizing the process of discovery and making connections, which is more fundamental than finished proofs. All this is wonderfully illustrated by Flannery's own story of her rapidly developing interest and proficiency in cryptography, as well as by the puzzles she uses to get readers thinking and introduce some basic concepts. Other threads, running from brief descriptions of her grandparents to her father's teaching methods and her relationship to family in the face of a media frenzy, give her story added depth, warmth and humor. 8 pages of b&w photos. (June)

Forecast: Workman is hoping to, and should, attract budding young mathematicians with a first printing of 35,000, a $65,000 marketing budget and an eight-city author tour.