Do ghosts really exist? Perhaps you think you've seen one! Next time you're reading under the covers, past your bedtime, just ask yourself ... (well, maybe don't actually!) ... what was that?! 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! 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?