In the Orbit of Sirens by T.A. Bruno

SPSFC

THE LAST FRAGMENTS OF THE HUMAN RACE ARE FORCED TO ADAPT TO A DANGEROUS NEW WORLD OR FACE EXTINCTION. When starship mechanic, Denton Castus, is caught in the destructive path of a devastating war, he abandons his home and seeks refuge on a distant planet. However, this new safe haven has undiscovered threats of its own. Eliana Veston, a scout preparing the planet for the refugees, struggles with a deadly pandemic that is killing off colonists. The hunt for a cure unleashes a new threat to humanity—the Sirens—mysterious beings with incredible powers and a deep hatred for invaders.