Implacable

As far from explored space as any human has ever been, Geary and the Alliance fleet are on their own, protecting a diplomatic mission in territory belonging to an alien species with still-unknown motives. The fleet is further imperiled by deadly challenges from other human factions seeking to disrupt his mission. When an advanced alien species arrives, the stakes are raised. With threats on all sides and orders that could damage the Alliance, Geary has to finally decide whether he must invoke the power that his long-revered name holds, all the while knowing that this might tear apart the Alliance, and destroy everything he has fought for.