Black Sun Quest of The Siren

Upon the twilight of the First Age of Terra, the Age of Progression,
a series of great and cataclysmic wars would erupt between its human
inhabitance and a mysterious race of invaders from the stars. The
consequences of such devastating conflicts were far-reaching. The invaders
were eventually defeated and repelled, but in the aftermath of these End
Wars, governments would collapse and humanity would face widespread
starvation and extinction.

Now with a ship and crew at their disposal, the Flint brothers at last embark on their vital mission: seek and "unlock" the greatest mystery to ever exist, one that has endured since the galaxy was young.
Obviously is no easy task, but the brothers and their crew are set nonetheless. For that they, under the direction of their newest matron, helm the Black Sun to begin their dangerous journey.
In order to reach this mystery, they must first gain a specific set of items: an ancient compass for guidance and two keys that will "unlock" it. These objects are spread across the galaxy and cannot be accessed easily. The brothers must act fast to locate them before the objects fall into the wrong hands.
Along the way, they encounter strange phenomena, Imperial forces that would love nothing more than to stop them, and a silent new enemy that watches from the distance, waiting to intervene. Can the Flints and the crew of the Black Sun evade their foes, or will these obstructions prevail over them? It's a battle of wits, willpower, and strength.
This outer-space thriller is a must-read for science fiction fans.