The Battle for Cathora (Book 3 of the Mytar series)
by Robert Cole
The transportation of the sixth Mytar, completes the Mytar group, however, their powers are still underdeveloped. In contrast, Zelnoff has gained further power and his armies roam the planet at will. When their hiding place is discovered, the Mytar children are attacked and scattered, but with the discovery of new information, they devise one last desperate plan to destroy Zelnoff.