The King in Reserve — Michael Pryor

Queen Tayesha's plan to rule all the saur is tormenting the land itself. Earthquakes, volcanoes, and vast crevasses are threatening to tear Krangor apart. To halt the queen's plans, Adalon and his friends must rescue a young king in exile. Their mission is thrown into turmoil, however, when the mysterious and terrible A'ak redouble their efforts to return from their magical banishment. Adalon, Targesh, and Simangee must rise to challenge after challenge as their lives hang in the balance and the fate of the world rests in their claws.