From the New York Times bestselling author of the Newbery Honor Book Roller Girl comes the first graphic novel in a hilarious and heartfelt series about a quirky nine-year-old, a LOT of stuffed animals, and the timeless, messy magic of growing up.

“A glorious, heartfelt story about family and growing up.” —Dan Santat, creator of National Book Award winner A First Time for Everything

It’s the last day of school, and Mabel Mulligan has big plans for the summer: She will spend all her time with her beloved, very much alive stuffed animals. She’ll design the most amazing tree house, complete with a zipline and swimming pool. And her parents are letting her move into the attic, which means no more sharing a room with her chaotic three-year-old sister, Pearl.

But when Mabel overhears a secret conversation between her parents, her plans are turned upside-down. Faced with big changes, Mabel must decide: Does growing up mean leaving old friends—and old dreams—behind? It’ll take a summer of stuffies, surprises, sisterhood, and shenanigans to find out.

Victoria Jamieson’s signature depth, sense of humor, and whimsical illustrations shine in this irresistible story about growing up, family, and finding your own way.