Princess Bun Bun — Richard Scrimger

Eugene, Winifred, and baby Bun Bun are off to visit their uncle who lives in a Great Big Apartment building called Castle Apartments. Could it be a real castle? When Bun Bun, who's just learned to walk, toddles into the elevator alone, big sister Winifred comes to the rescue. As they go up and up and up in the modern-day tower, they meet a scary monster, a witch, and even a beautiful princess. Or do they?