Time of the Eagle by Sherryl Jordan

Avala is the daughter of two healers from two very different societies. She grows up in her mother's nomadic tribe and eventually leaves to fulfill her destiny of uniting four tribes in an uprising against the evil emperor. It was a good enough read, and didn't suffer for being a sequel, but it's no award-winner. NAY, but keep it around to give to the readers who liked Clan of the Cavebear and that sort of thing.