Fires of Azeroth is a 1979 science fiction novel written by C. J. Cherryh. It is the third of four books composing the Morgaine Stories, chronicling the quest that drives an obsessed Morgaine and her warrior companion, Nhi Vanye i Chya, ever onward. This book has no connection to the Warcraft-universe?, even though they share the Azeroth name.
The Gates are passageways through space and time that can, if misused, destroy entire civilizations. Such cataclysms had happened in the past, most recently to the qhal, a species that at one time had enslaved other races, including humans. The Union Science Bureau had dispatched a hundred men and women on a one-way mission to destroy the Gates, closing them behind them as they traveled from one world to the next. Morgaine is the last survivor of that band.
In Vanye's world, they had been opposed by an evil ancient being whose knowledge of the Gates rivals Morgaine's own. The creature had taken over the body of Chya Roh, Vanye's cousin, then fled through the Gate of Ivrel to the land of Shiuan. There, he had amassed an army by promising men and half-breed qhal a way out of their dying world. It had taken all of Morgaine's guile to force a passage for her and Vanye through the Gate of Shiuan into a third world, but they were powerless to stop Roh from following with his forces.
Being two against a hundred thousand, they are forced to flee into the forests of Azeroth, finding shelter with friendly villagers. Eventually, the natives call on their qhal lord for guidance. Morgaine meets with Merir, lord of Shathan, and receives grudging permission to travel where she wills.