Мерседес Лэки: Storm Breaking

In this book, everything is solved. Elspeth and Darkwind act as Envoys and go into Hardorn to meet their once-enemy Tremane. The people of Hardorn want to make him their King, but only under conditions. Karal, Firesong, An desha, the gryphons, Sejanes (a mage of Tremanes) and Master Levy (a Mathematican and clever engineer) head towards the Dhorisha Plains. They are to go where the tower ruins are that were once home to Urtho and his people over a millenia ago. The Storms are returning to that spot and they are going there to try and prevent another Cataclysm from occuring that will possibly destroy them all. Urtho was a great experimentor that had created very dangerous Weapons to use against Ma ar. He deamed them too dangerous to use and sealed them in a chamber of the tower. The Kalenedral, Sworn ones to the Goddess, have been protecting these things from greedy mages. But now, maybe they are of use.