Sally's family doesn't believe her when she says there's a hippo in the yard—but that's not the only surprise. "I don't think so, dear," says her mom. So Sally just takes some lettuce to feed the hungry hippo. Dad doesn't believe her about the tiger, and Nana won't put down her knitting to go see the koalas in the hammock. Lively illustrations by The New Yorker cartoonist Liza Donnelly capture the hilarity of a garage full of zebras—and the satisfying shock on everyone's face when it turns out the zoo animals have escaped. . . . and Sally knows just where to find them!