. . "Mars (Planet)" . . "Juvenile works" . "The story of the two robot vehicles, Spirit and Opportunity, that were sent to explore Mars, lasting far past their projected lives of 3 months and sending back invaluable images of the environmentally hostile planet." . . . "The mighty Mars rovers : the incredible adventures of Spirit and Opportunity" . . . . . "Electronic books" . . . . . "The mighty Mars rovers the incredible adventures of Spirit and Opportunity" . . "Dust jackets (Bindings)" . .