THE WORLD'S MOST HORRID SCHOOL JUST GOT MORE HORRID!When Granny Grit is called away on a most mysterious mission, twelve-year-old Ferg and his friends are left at the mercy of Cook Fracas's frenzied food fights, Colonel Craven's manic panics and Miss Nottynuf's nervous nail-biting. To make matters worse, the Grand Plan is still missing and the kids must find it before someone truly awful does.Can Ferg and his friends survive another term at the world's most horrid school? Return to Horrid High and find out!