The Earther Equation — Kenneth Tam

The fourth novel in the Equations series: Victory for the Allies is finally at hand. After two years of war, and millions of lives lost, the Kroggs have fallen back to their home systems, where they now make a desperate stand. With the combined forces of the Earthers, the humans, and the Larosians taking part in this siege, victory for the Allies seems inevitable. But faced with possible extermination, the Kroggs become a more cunning foe than ever before, and their deceptions may undo all of the successes earned so far... Now it falls to Setter Caine, Andra Ursla, Savanna Felix, Andros Grieve, and all the Earther warriors to find a way to victory. They must outwit the defenses put in place by the clever Krogg Queen, and make whatever sacrifices are necessary to bring an end to the war, once and for all.