A debut picture book from actor and producer Jake Gyllenhaal and writing partner Greta Caruso about a little boy, his uncle, and the secret society determined to make their relationship bloom.

The art of Auntieology and Uncleology is a sacred craft, but ten-year-old Leo has an Uncle Mo—a clueless stationery supply salesman with good intentions—who just doesn’t get it. Yet.

The Secret Society of Aunts & Uncles is a madcap, magical adventure into the heart of what it means to have an aunt or uncle—how we learn to keep each other close and how we find love in the simplest things.

Jake Gyllenhaal and Greta Caruso paint a goofy, loving portrait of one of the most important relationships in children’s lives in this funny and heartfelt romp of a picture book with witty and inventive illustrations by award-winning illustrator Dan Santat.