Naturalist Karl Darwing notices the footprints of a one-legged creature in the snow. As the naturalist attempts to follow the trail and make a discovery, he is surprised to find the number of footprints increasing. By the time Karl's guesses go as far as a ten-legged space alien or five bandits, he decides that the potential discovery is best given up for now - but the reader can have the pleasure of getting to the bottom of things. Young readers can practise their counting and reading skills in this funny and educational book.