The Crystal Gems — Garnet, Amethyst, and Pearl — are three of the toughest heroes on earth. They are also mentors to Steven Universe, a gem/human hybrid boy whose mother was a great Gem leader. This guide, told from Steven's point of view and written by the show's very own creator, Rebecca Sugar, is packed with facts about the Crystal Gems' powers, abilities, and origins. It also includes original art and a special introduction from Sugar. This book is a must-have for any Steven Universe fan!