The seven towers

"They are seven players in a game of deadly magic Eltiron, Prince of Sevarin; Crystalorn, Princess of Barinash; Ranlyn, the desert rider; Jermain, the outlaw; Vandaris, the soldier; Carachel, the Wizard-King; and Amberglas, the sorceress. Each of them has a secret, and each fights his or her part in the thrilling battle that has put seven kingdoms on the very edge of destruction"--From publisher description.