Rubicon - Jennsen G. S.

Our universe is but a snowglobe—an experiment born of desperation and hope. The true universe is unfathomably vast, teeming with life and untold wonders. And it is enslaved.

Created by ancient aliens in a daring gambit to understand the nature of the enemy, humanity is now asked to be the savior of a universe not their own. If they are to succeed, they must rise above not only their fractious past but the sins of their genetic ancestors to boldly embrace a future they never dared imagine possible.