When Stella's brother, Sam, cries "Stella! Stella! Look! The sky is on fire!" the pair begin a new adventure exploring the wonders of the natural world. A vast, luminous sky, the sun, the stars, and the rising moon form the backdrop for their nocturnal expedition. As they encounter raccoons, fireflies, tree frogs, and bats, Sam wonders if the moon can swim, if the sun wears pajamas, or if he can catch shooting stars with his butterfly net. Stella, as always, has an answer for every question. Marie-Louise Gay delights readers once again with this whimsical, tender, and humorous book that captures perfectly the freshness of young children discovering the world.