With clever dialogue and stylish retro spreads, de Sève (The Duchess of Whimsy) and Schmid (Perfectly Percy) give a shot of energy to the familiar theme of siblings fighting over a toy. Fifi has a nearly inexhaustible stream of ideas to get her younger sister Peanut’s new ball away from her, “but Peanut didn’t want to share. Her ball was new. And it was special.” Fifi tries dressing up in a starry cape and pretending to be a fortune-teller: “Where is my crystal ball?” she asks. “Not here,” says Peanut, unimpressed. “Check the closet.” When the ever-resourceful Fifi runs off with a live seal named Bob and a blue spaceship, Peanut is left alone with her treasure. “The end,” the narrator declares, as Peanut stares disconsolately; “(or not…)” the next page continues—and Peanut joins the fun. Schmid’s bold, black outlines and graphic forms play Peanut’s dumpling roundness off Fifi’s angles and corners. Matte paper and three sun-faded colors heighten the vintage look, and the translucent suggestions of Fifi’s imaginary ideas provide additional interest. Siblings may end up squabbling over this book. Ages 3–5.