Welcome to Spook School...where the pupils have bags of spirit! It's exam time at Spook School, and Charlie and Lewis's last exam is their toughest: they have to solve a baffling and very spooky mystery on Earth - in just twenty-four hours. A hotel is being plagued by terrible smells and peculiar scuttling noises, and all the terrified visitors are leaving. Soon Charlie and Lewis come face to face with the strangest monster yet- and they come in their hundreds!