Have you ever met a yeti? What about the fearsome, flying ahool, lake-lurking Ogopogo or a sea serpent? No? Well, many brave explorers and unsuspecting eyewitnesses have, and they're here to tell you all about it. "It was an enormous size, some thirty-five or more feet long ... I was frozen with terror at this apparition." How scary is that? Read the stories, consider the facts, study the frightening illustrations and then put on your thinking cap. Can you figure out what they really saw? From the award-winning team behind Real-life Mysteries, these terrifying tales are collected into six chapters, each with its own LET'S INVESTIGATE section, that will get your heart racing and your investigative brain working!