The Destiny Equation — Kenneth Tam

The eighth and final novel in the Equations series: The Earthers have been defeated at almost every turn. Omega, the sentient plague that created their race, is simply too powerful to overcome. With help from old friends and former enemies, the Earthers have been able to briefly delay his advances, but now, at last, he is making his move against Earth. Omega's fleet numbers in the thousands, and his impossibly large invasion force includes billions of minions. He simply cannot be stopped. The Earthers' only hope is 'the plan', an ambitious gambit devised by Supreme Consul Setter Caine in hopes of cheating the plague of total victory. Omega can overpower any force in the universe. Even with the help of their allies, the Earthers cannot defeat him... but they are willing to die trying.