9In a solar system full of planets, Mars feels all alone. No one has time to play with him. Will he ever get a playmate?Mars' First Friends is a universal story about man's?and Mars'?best friends?our beloved pets. In this sweet solar system story, Mars is lonely and just wants someone to play with, but the planets are all too busy. That is until Earth sends her little brother Mars his first friends: the rovers Spirit and Opportunity With its darling prose and charming plot, this book offers a new take on the Mars rovers stories, and also includes educational back matter with an abundance of information about the solar system, Mars, and his real-life pets?NASA's rovers Could there be life on Mars? Listen on to find out