As one of our closest neighbors in the solar system, Mars has long fascinated people who are interested in space exploration. A True Book: Space series dives into the many components that make each planet distinctive and exceptional, as well as explore many of the other components that make up Space. This series includes an age appropriate (grades 3-5) introduction to curriculum-relevant subjects and a robust resource section that encourages independent study. Readers will find out how we have used advanced technology to explore the surface of Mars and why some scientists think they might one day discover life on the fourth planet from the sun. They will also learn what it is like on Mars' surface and why scientists are paying such close attention to the planet's moons.