Desperate Defense — Chris Hechtl

After the terrible A.I. war Terrankind had begun to move out to the stars. But, the void between stars can harbor unseen dangers. Jack Lagroose has settled in as Governor of the Eden colony. But, when a survey ship comes in with a warning of being attacked, he has to martial the colonists to find a way to defend themselves should the aliens find them.
In Sol, Terrans are slowly rebuilding from the war when the survey ship returns to spread the warning. Consternation and disbelief hit the population like a wave. Some people are determined to put up a last ditch defense by forming a volunteer navy while others do everything in their power to undermine them.
But the aliens do not care. They are coming, relentlessly...