HarperCollins Mr. Grieves and the Grievous Deeds
HarperCollins Mr. Grieves and the Grievous Deeds

Mr. Grieves and the Grievous Deeds

By Matt Lieberman

$18.99

Publication Date: September 30, 2025

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Ages 8 to 12, Grades 3 to 7

From Matt Lieberman, the writer behind the hit Ryan Reynolds movie Free Guy, comes Mr. Grieves, an action-packed, antic-filled middle grade novel about a mysterious, unorthodox nanny who encourages his kids to do anything but follow the rules. 

When Victoria and Ozzy’s mom, the famous child behavioralist Anna Gray, disappears without a word, Victoria can’t help but think it’s all her fault. So Victoria does what so many children have tried to do: she commits herself to being perfect in the hope that her excellent behavior will win her mother back. If she can just get into the extra-elite Wheaton Prep School, mom would have to return!Victoria’s pretty sure her plan is perfect—until Mr. Grieves arrives. Wearing a bowler hat and accompanied by an irascible capuchin monkey named Kevin, Mr. Grieves is anything but your usual babysitter. He has all sorts of insane ideas about right and wrong, he drives a crazy van that’s definitely not street legal, he only listens to music that seems designed to make your ears bleed, and he’s able to convince everyone to do all sorts of wild things. Before she knows what’s happening, Victoria and Ozzy have stolen a priceless artifact, evaded the police, and been in an epic pillow fight for their lives. Part Lemony Snicket, part Adventures in Babysitting, and all sorts of fun, Mr. Grieves and the Grievous Deeds is the debut novel from the screenwriter behind the hit Ryan Reynold’s movie Free Guy, Matt Lieberman.

About the Author

Matt Lieberman has had seven screenplays produced by major studios, including Free Guy, The Christmas Chronicles and its sequel, and The Addams Family. Originally from New Jersey, Matt is a graduate of NYU’s Tisch School of the Arts. He lives in Los Angeles with his wife, daughter, and two dogs.

Format: Hardcover

Length: 240 pages

Publisher: HarperCollins

Publication Date: September 30, 2025

ISBN: 9780063273429

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