After enlisting the reluctant help of a Union scientist with unique knowledge of the Aterniens, Master Commander Carter Rose embarks on his most dangerous mission yet.

Ahead of them is Old Aternus, a dark and inhospitable world where the Aterniens were exiled to after the first war. Now, abandoned, Old Aternus holds the key to discovering the secret location of the Empire’s new home planet, and the chance to finally strike the Aterniens where it hurts.

However, Rose discovers that Old Aternus is far from a dead ruin. Nestled amongst its abandoned buildings are dangers more savage than any he has faced before.

A betrayal almost derails everything, but the appearance of an unlikely ally provides hope, and the information Rose needs to continue his mission.

Markus Aternus, the god-king of the Aternien Empire, believes that he and his post-human civilization are immortal and impervious to harm.

Master Commander Carter Rose intends to prove him wrong, but if he fails this time, then the Empire will sweep through the heart of the Union and lay waste to what remains of humanity.

Battle Aternus is book #5 and the final installment of the Aternien Wars series, an epic blend of space opera and militaristic sci-fi following an elite crew of augmented officers fighting a post-human enemy styled on the myths of ancient Egypt.