Courageous (Starships in the Abyss #1)

In the depths of the cosmos, the relentless Xortaag armada sweeps across the galaxy, leaving shattered worlds in its wake. Now, their sights are set on Earth. But in the face of annihilation, hope emerges from the most unlikely a starfighter pilot with a knack for quoting movies, a fearless stuntwoman, a deadly super-assassin, and a cunning cosmic spymaster. Their mission is not only to save humanity but to protect billions of intelligent beings across the multiverse.

The Mercy of Gods (The Captive’s War #1)

How humanity came to the planet called Anjiin is lost in the fog of history, but that history is about to end. The Carryx – part empire, part hive – have waged wars of conquest for centuries, destroying or enslaving species across the galaxy. Now, they are facing a great and deathless enemy. The key to their survival may rest with the humans of Anjiin.

Wormhole

In 2110 Earth is suffering major resource shortages, and the impact of climate change is peaking, with much of the planet’s equatorial regions turned to lifeless desert and populations displaced. Colonies have been established on Mars and the Moon, but these cannot hope to sustain any more than a scant population of hundreds of citizens.