Gr 3-6-- These attractive volumes offer much for report writers and browsers. Each begins with a brief overview of the discovery of the planet. With plenty of full-color and black-and-white photographs and paintings, the authors detail what we know, suspect, and hope to find out about Earth's close neighbor Venus and the mysterious ringed Saturn. Although these are called ``First Books,'' they are by no means as elementary as the planet series from Children's Press. There is much technical information presented, especially in Venus as Schloss discusses land formations and the complex instruments that made this data available. Libraries owning books on planets written before the 1980s will want to update their collections with these titles, which cover the Pioneer and Magellan spacecraft missions. While not as distinguished as Franklyn Branley's Saturn: The Spectacular Planet (HarperCollins, 1987), both offer solid texts in enticing packages. --Denia Lewis Hester, Dewey School, Evanston, IL