s/t: More games, puzzles, paradoxes & other mathematical entertainments from Scientific American : with thoughts from readers, afterthoughts ... from the author, and 105 drawings & diagrams The twenty chapters of this book are nicely balanced between all sorts of stimulating ideas, suggested by down-to-earth objects like match sticks and dollar bills as well as by faraway objects like planets and infinite random walks. We learn about ancient devices for arithmetic and about modern explanations of artificial intelligence. There are feasts here for the eyes and hands as well as for the brain.