Proofs that really count. The art of combinatorial proof
[Washington DC]: The Mathematical Association of America, [2003]. First edition, large 8vo, pp. xiv, 194; pictorial paper covered boards; fine. Inscribed by Benjamin "my 260th=2^2x5x13th signed book ... and counting!" "This is a magical introduction to the simplicity, power, and beauty of bijective proofs ... [it] explores more than 200..... More