There's a Secret Prankster wreaking havoc all around town. No one knows for sure whodunnit, but all fingers are pointing at Billy. Who else would set cold porridge bomb traps, stuff bananas into exhaust pipes and pour jam into Mrs Furball's wig? But one thing we do know - whether Billy's sinking a gondola in Venice, solving a murder mystery, or chasing ghosts through a fairground, he's bound to be explaining: "IT WASN'T ME!" 3 prank-a-rifically hilarious stories in 1!