From audible.com:

The entire four-book Trackers series in one bundle: over 30 hours of post-apocalyptic survival fiction and action.

No power. No rules. No help coming.

The end of the world is just the beginning of the hunt....

Five days ago, North Korea detonated three strategically placed nuclear warheads over the United States, triggering an electromagnetic pulse that crippled the country. A second attack destroyed the nerve center of America in a nuclear blast that flattened the nation's capital. As the government falls apart in the aftermath, the survivors must decide how far they will go to save the ones they love.

In this lawless new world where the most ruthless thrive while innocents suffer, a sheriff, a retired marine, a nurse, and a senator turned secretary of defense are faced with keeping their communities and families safe. One thing is certain - they won't be able to save everyone. Not with their humanity still intact.

The explosive Trackers series is a harrowing story of survival and a realistic depiction of what an EMP attack and the aftermath might look like from former Homeland Security disaster mitigation officer and New York Times best-selling author Nicholas Sansbury Smith. Packed full of action, survival tips, and a unique twist on the EMP genre, the Trackers series has thrilled hundreds of thousands of fans across the world.

From audible.com:

No power. No rules. No help coming.

The end of the world is just the beginning of the hunt....

Estes Park Police Chief Marcus Colton and tracker Sam "Raven" Spears have never liked one another, but when a young girl goes missing in Rocky Mountain National Park, Colton hires Spears to help find her. Their search ends after a night of catastrophic events. When word reaches Estes Park that the nation has been hit by a coordinated electromagnetic pulse attack, Colton and Spears are forced to work together again. But they quickly realize they aren’t just tracking a killer - they are tracking a madman during the middle of a war on American soil.

Halfway across the country, Senator Charlize Montgomery awakes to find the nation’s capital has gone dark. Forced to set off on foot, she treks across a city that has woken to a new world, and as the night progresses, she learns the EMP attack was just the beginning of the horror.

The explosive Trackers series is a harrowing story of survival and a realistic depiction of what an EMP attack and the aftermath might look like from former Homeland Security Disaster Mitigation Officer and New York Times best-selling author Nicholas Sansbury Smith. Packed full of action, survival tips, and a unique twist on the EMP genre, the Trackers series has thrilled hundreds of thousands of listeners cross the world.

From audible.com:

The deadly hunt continues as the hunters become the hunted....

Five days ago North Korea detonated three nuclear warheads over the United States, triggering an electromagnetic pulse that crippled the country. A second attack destroyed the nerve center of America in a nuclear blast that flattened the nation’s capital. As the United States descends into chaos, the survivors must decide how far they will go to save the ones they love.

Police Chief Marcus Colton has struggled to maintain order in the isolated mountain town of Estes Park, Colorado, with the help of expert tracker Raven Spears and stranded pilot Major Nathan Sardetti. Together, they fought the evil terrorizing the town, but new threats are rising and old rivalries are coming to a head.

Charlize Montgomery, newly promoted to Secretary of Defense, is caught between loyalty to her country and love for her son, Ty. When the Marines sent to find Ty in Colorado discover a scene of unspeakable carnage, the straightforward rescue mission turns into a deadly chase.

From audible.com:

A deadly storm of violence sweeps across the United States....

One month after the North Korean attack, the United States continues to fall into anarchy. In Estes Park, Colorado, Police Chief Marcus Colton and tracker Sam "Raven" Spears work tirelessly to defend their hometown. But after a brutal coordinated attack, they realize it will take much more than roadblocks and a volunteer militia to protect their borders and keep their families safe.

Defense Secretary Charlize Montgomery has been reunited with her son, but his homecoming is short-lived due to the state of the FEMA survival centers around the country. She heads to the one in Charlotte, North Carolina, with her loyal bodyguard, Albert Randall. Outside the camp's walls, the city has descended into chaos, and desperate civilians will do anything to get inside. When Albert stays behind to rescue his sister, he is caught in the middle of a turf war between rival gangs.

In this lawless new world where the most ruthless thrive while innocents suffer, Colton, Raven, and Charlize are faced with their toughest challenges yet. One thing is certain - they won't be able to save everyone. Not with their humanity still intact.

From audible.com:

The deadly hunt ends in the thrilling final book of the Trackers saga....

The mountain town of Estes Park, Colorado, is scrambling to recover from the betrayal of two of their police officers, and prepare for threats outside their borders. But with Chief of Police Marcus Colton imprisoned by rival Sheriff Mike Thompson, the job to protect the isolated town is left to Sam "Raven" Spears and newly promoted Captain Lindsey Plymouth. They will do everything they can to bring Colton home and save their citizens, but one thing is certain: a war is coming to Estes Park, and no one will be spared from the horrors.

Across the country, Secretary of Defense Charlize Montgomery continues to lead recovery efforts in the wake of the arriving Chinese workers and soldiers. But the threat of foreign soldiers on American soil isn't the only problem - the Sons of Liberty and other domestic terrorist groups continue to rise to power, enacting a wave of violence and chaos that threatens to derail the recovery efforts.

Will Raven, Colton, and Charlize save the United States from collapse? One thing is certain - they won't be able to save everyone. Not with their humanity still intact.