Sanctuary (The Sanctuary Series) by Nite Waller

Description

Sanctuary is set in an era where world-wide conflicts are commonplace and nuclear weapons are far from the deadliest of man's devices. With lifespans edging closer to seven hundred years long, the population has exploded, resulting in nearly six hundred colonized worlds and a population of three and a half trillion.
On the fringes of known space, a recent colony by the name of Arctica has caught the attention of a foe more terrible than any ever faced by mankind, worse even than the darkest nightmares of those who fear the beyond. The Phratry, a race whose savagery is matched only by their efficiency, have set their sights on those who live on Arctica, setting the stage for the largest and most terrible war either race has ever seen; and the Humans have no idea what is about to hit them.
Sanctuary is a brutally realistic novel where the experiences of individuals from both sides, ranging from a forsaken Phratry noble to a common businessman, are detailed in a gripping story that combine to give a global perspective on this very new type of war.