Planet Athion: Darkest Skies Books in Order

Darkest Skies is Marissa Farrar's contribution to the larger Planet Athion universe, so it mixes shared-world science fiction with her taste for intense relationship stakes. The series starts on Earth as alien invasion throws ordinary life into chaos, then keeps widening until the future of human women, and eventually whole populations, is at stake.

The books follow one central heroine and the men around her through invasion, resistance, uprising, and finally evacuation. Their Invasion sets the shock of first contact and survival. Her Resistance and Our Uprising turn that fear into action. The Exodus pushes the story even farther, with Earth no longer safe and Athion becoming the only workable refuge.

This is more sweeping than some of her other reverse harem work.

Because it sits inside a bigger universe, there is more going on than romance alone. You get observatories, alien allies, hostile species, and the pressure of political choices alongside the central relationship arc. If you want sci-fi romance with movement, bigger stakes, and a series that keeps escalating instead of staying in one bunker or cell, Darkest Skies is the Planet Athion line to try.