The War of Mechanas (Tond, #4)

Rolan’s quest has been completed, but now the fate of his world, Tond, hangs in the balance as the armies of Gaeshug-Tairánda explode out of Borrogg to overwhelm and destroy. Rolan, Shillayne, Tayon, Ai-Leena and the others renew their charge to defend Tond and fight. Joining them are thousands from the formerly hostile Karjan Imperium, as well as by strangers who are not of Tondish birth and who bring with them an unheard-of new power. In this climactic addition to the Tond saga, Rolan and his group will all be tested. Even Shar himself must confront the great menace, and Rolan must learn how to wield the ultimate weapon against the Void and survive a cosmic voyage.