Puzzles from Other Worlds

Why did Lieutenant Flarp refuse to spin the coin? Can a polybug have seven edges? What convinced Ada that she was in another universe? Brimming with conundrums like the above, and peopled by such bizarre characters as Dr Moreau, tethere purple-pebble eaters, and the not-so-intelligent race of three-eyed humanoids who inhabit the planet Chromo, Martin Gardner's latest collections of science-fiction puzzles will keep the reader amused and engrossed for many hours.Each of the tales contains a challenging puzzle involving logic, wordplay, palindromes, geometry, probability, or magic numbers. Every puzzle leads to a second and related puzzle, which in turn leads to a third, and sometimes a fourty, and the answers on all four levels are listed at the back of the book. Written by a master puzzle-maker, this is an irresistible book for both science-fiction and puzzle fans.