In the fight for humanity, one final hope remains... Humans are losing the war. Master Sergeant Reed Beckham and the survivors of 1st Platoon must battle through the tunnels--where they make a grisly discovery. Dr. Kate Lovato is working on a new bioweapon to destroy the Variants when a derelict Navy Destroyer crashes into the Connecticut shoreline carrying yet another threat. As the doomsday clock ticks down and military bases fall across the country, the human race enters the age of extinction. Will they prevail - or will mankind vanish off the face of the planet?

The final, never-before-published book in USA Today bestselling author Nicholas Sansbury Smith's propulsive post-apocalyptic series about a soldier's mission to save the world. In Europe, Master Sergeant Joe Fitzpatrick and Team Ghost return from a mission deep into enemy territory only to find that the Variant army has grown stronger. And, they are advancing toward the EUF's final stronghold in Paris. Back in the United States, President Ringgold and Dr. Kate Lovato are on the run. The Safe Zone Territories continue to rally behind the ROT flag, leaving Ringgold more enemies than allies. But there are still those who will stand and fight for America. Commander Rachel Davis and Captain Reed Beckham will risk everything to defeat ROT and save the country from collapsing into Civil War.

Book six in USA Today bestselling author Nicholas Sansbury Smith's propulsive post-apocalyptic series about a soldier's mission to save the world. A new monster emerges. The newly christened leader of Delta Force Team Ghost, Master Sergeant Joe Fitzpatrick arrives in Normandy over 70 years after Allied Forces joined the fight against the Nazis. The war to free survivors and eradicate pockets of adult Variants and their offspring is underway by the European Unified Forces. But as the troops push east, rumors of a new type of monster spread through the ranks. Fitz and his new team quickly realize that the fight for Europe might be harder than anyone ever imagined. Back in the States, Captain Reed Beckham and Dr. Kate Lovato are settling into a new life on Plum Island. Across the United States, the adult Variants have all been wiped out, and the juveniles are on the run. But the survivors soon realize there are other monsters at home, and they may be human.