100 Perceptual Puzzles Author:Pierre Berloquin In this volume, master puzzler Pierre Berloquin has assembled a dazzling array of brainteasers based on geometrical figures. Circles, parrallel lines, dots, knots, ropes, mazes, and matchsticks become the focal point of hours of headscratching and good fun. And you don't need to be a mathematician to solve them. — Pierre Berloquin is also the aut... more »hor of 100 Games of Logic, 100 Numerical Games, and 365 Excercises for the mind.« less