The Will of the Gods

To alert her world to the coming of the strangers from space, the gods had given Jalav the mission to bring truce between the men of the cities and the women of the plains. Now she must venture among the latter - herself a war chief of the Midanna - going among her tribal enemies, the amazons of the feuding clans. But go she must - and behind her came the macho warriors of Sigurr whom she thought she had tamed, but whose real intentions were an unsuspected secret! (from the back cover of the DAW Books first edition)