As the first waves of injured bystanders, guardsmen, and rioters arrived at hospitals, it became apparent that a deadly new disease had been unleashed on the population. Whether the virus was naturally occurring or an escaped lab experiment, Cade hadn't a clue and wasn't especially concerned until he learned of its unprecedented virulence, unusual method of transference, and the fact that, according to the news, it brought the newly dead back to life, semi-mindless, and with an insatiable desire to feed on the flesh of the living.

After running and gunning across much of the western US, Cade Grayson, former Delta Force operator, is finally reunited with his wife, Brook, and daughter, Raven. Hours after arriving at the relative safety of Schriever Air Force Base in Colorado Springs, the new Capital of the United States, Cade is approached by the new president, Valerie Clay. Her request is simple: she appeals to the patriot in him to rejoin the unit that he left for civilian life 15 months prior and once more go into harm's way, taking the fight to the enemy.

Reeling from a surprise attack, and with two fires burning out of control, Schriever Air Force Base goes on high alert. Former CDC Scientist Sylvester Fuentes, the apparent target, is killed along with others. Destroyed in the conflagration was the Omega antiserum Fuentes had been working to perfect and just hours prior had tested successfully on one of the recently infected.

Outbreak - Day 16: With an estimated 99 percent of the United States' population having already succumbed to the Omega Virus and been reanimated to form roving hordes of flesh-eating monsters, two groups of survivors struggle against long odds to survive the zombie apocalypse.

Allegiance picks up two days after A Pound of Flesh left off. Outbreak - Day 15. With an estimated 99 percent of the United States' population having already succumbed to the rapidly spreading Omega virus, and countries and cities worldwide teeming with the dead, the struggle to survive the zombie apocalypse continues unabated in the high desert of Colorado.

Cade Grayson, father, husband, and former Delta Force operator collected his fair share of ghosts as the Omega virus ravaged the United States, turning the majority of her population into mindless automatons hungering for human flesh. Wearing incredulous stares, the faces of those ghosts - dozens of men, women, and children he was unable to save during his many forays into the Z-infested wasteland - visit him nightly during the early morning hours when defenses are dulled and REM sleep has him in its firm grip.

In the three weeks since mounting a brash rescue mission to a zombie-infested Los Angeles and returning home to find lives of loved ones hanging in the balance, Cade has occupied himself with runs outside the wire to procure supplies necessary to ride out what the Farmer's Almanac predicts will be a long, cold winter. As Cade and his team seize an unforeseen opportunity provided by the plummeting temperatures, he quickly realizes they are in a race against time - and nature's fickle whims.

After decades of planning, the contagion was unleashed, and overnight hundreds of millions died and came back as rampaging, undead monsters. The living that had been lucky enough to survive the first day of carnage, lucky enough to be in the right place, and lucky enough that some of them had the skills to survive soon found out there was much more to worry about than just zombies.

Like a fragile house of cards in a hurricane, Presidents, Premiers, entire governments and their ruling bodies disappeared instantly. Some had ensconced themselves in deep underground bunkers or remained holed up in fortified strongholds, but history would tell that most had been swallowed up by the dead - never to be heard from again. On that last normal Saturday in July, while an unknown virus indiscriminately wreaks destruction and death to all four points of the compass.

Cade Grayson - husband, father, patriot - discovered two undead enemy soldiers on American soil, and soon the official call to duty came directly from the President herself in a transmission beamed by military satellite to Cade's refuge in rural Utah: It was time to take up arms in defense of his country once again. Valerie Clay’s hard-to-fathom video footage, showing thousands of enemy soldiers establishing beachheads all along the West Coast, made it impossible to resist. He was a former US Army Delta Operator and he had to come to the aid of his dying country.

Army veteran Lee Riker is staying in an Atlanta shelter and supporting himself with the odd carpentry job when his sister, Tara, summons him home to Indiana for the reading of their mother’s will. Riker boards a Greyhound bus in Atlanta with his duffel bag, less than $200 to his name, and a secret he must protect at all costs. Riker makes it to Middletown only to learn his sister has recently witnessed a gruesome death. Insisting she saw the victim rise from a pool of his own blood to attack the Samaritan rendering aid, Tara floats the idea that the man may have been a zombie.

The people that tried to kill the world almost succeeded. They were fiendishly clever but they didn't take into account the vets, the truckers, and the two-fisted fighters who didn't know how to give up. Gunny and his band of survivors continue their journey along the Zombie Road, saving as many as they can along the way. They power through the undead hordes with their modified semi-trucks to beat the ticking clock of nuclear meltdowns.

The finale of the Zombie Road tale. It's been a month since the outbreak, and the survivors of the zombie apocalypse have started a new life in a walled city. There are still a few enemies that need to be dealt with, the kind that can think and plan, and they can be more devastating than a horde of the undead.

The beautiful saga about surviving the zombie apocalypse that David Simpson created continues. This book focuses on the relationship between Jessie, the disfigured road angel, and Scarlet, the daughter of the high priest of the Anubis cult. They are both damaged and young and have to bear a heavy burden for their age. Both have powers beyond human capacity. Both are the children and heirs to their fathers' legacies and empires, and they should be mortal enemies, not working together. They should be trying to kill each other, not trying to save what's left of the world.

The world is recovering from a near extinction level event. Fortified enclaves and barricaded towns have managed to survive the long winter. Spring brings new hope and new beginnings. One boy, thrust too quickly into manhood, is learning to find his way in the new wastelands. With hopped up machines and purpose built muscle cars to run the roads, a new breed of pony express rider is born.