Here’s more from the press release: “Mary spends her days being scary. She scares her mom, 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.”
Orchard Books, a Scholastic imprint, has set the release date in September 2017. This project marks the second time that Stine and Brown have worked on a book together. Little, Brown Books for Young Readers published their first book, The Little Shop of Monsters, back in August 2015.