If you find numbers confusing—or, at times, even boring—you have something in common with William Playfair. When everyone else saw numbers, Playfair dreamed in Lines, Bars and Circles (Kids Can, $17.95). Helaine Becker takes readers through the life and times of this colorful thinker, now known as the inventor of the graph. Playfair was indisputably a pioneer, but he was, tragically, perhaps a little too forward-thinking for his time. Featuring fanciful illustrations by Marie-Eve Tremblay and bite-sized historical vignettes, this book is more than just a lesson in mathematics: like a graph, it tells a story. Ages 7-10.