Crystal Keepers is an exciting, action packed book that reels you in entirely. Cole Randolph is an 11-year-old boy, who is trapped in the outskirts; a parallel universe of sorts. He, and his companions, travel to Zeropolis, the third kingdom of the five. Here he is looking for Constance, one of the lost princesses. And his enslaved friends. He’s running as an fugitive, and goes undercover. In this technologically advanced city, he faces many challenges. It was fun and exciting, it constantly keeps you engaged. Read this book!