There are thirteen Jiggy McCue books, plus three 'Jiggy's Genes' stories about ancestors of Jiggy's, also called Jiggy. THE TROOF was specially written for World Book Day 2011. Story. Jiggy should have known that a school trip to the Natural History Museum with class dumbo Eejit Atkins wouldn't be a normal sort of day. But when he and Atkins step into one of the exhibits and find themselves in a real cave with real cavemen, things start to seriously weird...