"Hannah?s got a funny feeling that it?s up to her to save the entire world, but before she can do so, she and her skeptical best friend Mia have to figure out what they?re saving the world from! As the girls? detective work proceeds, they uncover a chain of clues that might unravel the children?s mystery of the vandalized town playground, but what about the massive space cruiser parked high in the stratosphere, and the aliens inside who are laying plans to invade Earth? Can a pair of middle-school detectives really save the world? Find out in this funny book for tweens!" -- Amazon.