In Disrupted Equilibrium book 4, a post-apocalyptic world is brought to its knees as a battle between mutants, enhanced beings, and humans ensues with the fate of humanity hanging in the balance. Carly is held captive by a violent hybrid pet and its master, Colonel Sebridge. When mutants overrun the military base, they take with them an ancient artifact that calls out to all infected creatures. Cowboy, an enhanced being, is hunted by a Wyrtevore who has stolen his memory. Meanwhile, Luke and Gavin are forced to fight scramblers to the death by a sadistic gang of vigilantes. Genevieve and Chloe find refuge in The Mountain where they must confront an old colleague and his daughter. Heroes die and others are changed forever as the infected prove to be powerful adversaries in a fatal game of chess between man and monster. Will they survive or will their struggles be in vain? Find out in this thrilling installment of Disrupted Equilibrium.