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This book was compiled and edited by Graham R. Putnam who is a collector of puzzles and also a magician.
This book proposes geometric and mathematical challenges, know-nows and many other type of puzzle which requires intelligence, skill, patience and general puzzle ability.
You will fin a large section on the Tangram puzzle and its almost unlimited combinations and possibilities. Also included is a section on the lesser known but equally amusing assortment of Form-a-grams and the interesting relationships they present.