From the mind that brought us the Goosebumps series comes a picture book about a rather unconventional girl. Meet Mary McScary! She doesn't say boo. She says "BOOOOOOOOO!" Mary spends her days being scary. She scares her mum, her dad, her pets, and even a balloon! But Mary has met her match when her cousin Harry McScary comes to visit. He's not afraid of anything, until Mary finds a way to give Harry the scare of his life... A wildly funny picture book by the award-winning talents behind Goosebumps (author) and Authur (illustrator) series. Features a strong and resourceful girl character who tries to scare her equally fearless cousin, Harry, with hilarious consequences Perfect treat for Halloween and beyond