Defiler — Cari Silverwood

This erotic space-opera trilogy is available in a single, well-priced volume - Preyfinders Trilogy.
Our Earth is on the edge of destruction, our cities are pocked with missile craters, and beneath the surface the alien factory queen lurks.

Four women of power may be our saviors. The last is Talia. Gifted by earth magic with a mastery of edged weapons, she's a katana-wielding, geek chick with a loathing of alpha men. Though bond mating enhances magic, she knows mating with aliens must be wrong. Besides, her destined bond mate, Brask, is an Igraak warrior of the caveman persuasion. One dominant male is bad enough. Dassenze, the alien man-god in the flesh, also desires her and no isn't a word he appreciates.

As they near their target, Talia's man problems become the lesser of many evils, for the factory queen awaits them with her nerve chewers and her drills. The price for being avenging, kickass heroines could be a messy death.

Warning: Dominance and submission themes, hot aliens, and gory violence. Mild horror too if you're squeamish.