Endpoint - The Backworlds, #8

What are you willing to lose in order to win? Only Craze seems to understand the galaxy is about to be lost. He can no longer keep the evil Quassers contained, and winning the war gets harder. The Quassers join forces with another enemy and become more threatening, more destructive, and more murderous. Planet after planet falls, and the only hope Craze has is a handful of tiny discoveries that might add up to a viable strategy.
But he needs the other planets in the galaxy working with him. So far, everybody is still out for themselves, leaving him to make the gut-wrenching decisions-the deaths of innocents in exchange for everyone's survival. Will his desperate efforts yield victory, or does humanity take its last breaths? This is the eighth book in the science fiction series, The Backworlds. A space opera adventure