You can count on an exciting time when you join junior detective and mathematical wizard Cal Q. Leiter. Use mathematical clues and fun calculations to uncover scam artists, catch vandals, nab hit-and-run drivers, and solve mysteries of all stripes. What are the odds you can figure all these out? Pretty good--if you read carefully and think hard, the facts will all add up!

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Gr. 5-8. Kids who consider themselves math whizzes may want to match wits with junior detective Cal Q. Leiter, who uses his mathematical genius to solve crimes and puzzles that baffle his friend, the local police chief. Each of the 22 chapters presents a new challenge for Cal. Simple, attractive ink drawings illustrate most of the stories and help maintain the light tone of the presentation, which recalls the innocent charm of books featuring Cal's literary predecessors, Encyclopedia Brown and Einstein Anderson. Although some of the problems require knowledge that readers may not yet have acquired in school, the clearly presented solutions are readily available at the back of the book. Recommended for dedicated, mathematically inclined puzzle fans. Carolyn Phelan
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