Ron Miller 
Saturn [PDF ebook] 

Saturn is the crown jewel of the solar system. Admired for centuries for its beauty–a pale gold ball surrounded by gleaming white rings–modern astronomers have discovered that Saturn is one of the most amazing of all the planets. From the mysteries of its glorious rings to its dozens of unique moons, one of which is large enough to be a world in its own right, the story of Saturn is also the story of astronomy and the discovery of the solar system.