Guide to the Crystal Gems (Steven Universe) Hardcover – October 6, 2015 by Rebecca Sugar 
 
Introducing the Crystal Gems from Steven Universe!
 
 
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 Rebecca Sugar. This book is a must-have for any Steven Universe fan!
 
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