Unicorns' Opal — Richard S. Tuttle

Placing the Sapphire of the Fairies in the Sword of Heavens cleared the skies over Cordonia. The end of the Darkness in that part of the world has alerted Sarac to the location of the Children and his evil minions are converging on the Rangers. The Sword of Heavens has pointed the way to the Unicorns' Opal, but the Children must stay one step ahead of the forces of evil to complete their task. Follow the adventure of the Children of the Ancient Prophecy as confusion, doubt, and betrayal infiltrate their ranks and threaten to bring an end to the hopes of the world.