No Real Allies, No Fixed Enemies, No Certain Battlefields:

Presumed dead by those closest to him and with no intention of setting the record straight, former army Lt. James Shelley is recruited by a black ops outfit devoted to two things: guarding the Earth from existential threats, and the Red. Operating for almost two years among soldiers who are enhanced, and controlled, just as he is, Shelley believes he's learned a proper caution in working with the mysterious artificial intelligence--until the Red's increasingly erratic behavior ignites an accidental war, and launches Shelley on a collision course with his old life.

In the final book of The Red Trilogy, Shelley must choose who--or what--to trust, while struggling to contain an escalating conflict that threatens to plunge the world into chaos, and destroy those he loves.