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New monsters. New terrain. New threats. Welcome to Australia.

The battle for Panama is over, and King Xavier Rodriguez secretly deploys the airship Vanguard to Queensland. The hunt for the Coral Castle is on. The rest of the fleet returns to the Vanguard Islands with new ships and supplies, but tensions rise with rumors of a hidden food cache.

When two sky people are murdered, Chief Michael Everhart knows the stage is set for mutiny. And with King Xavier off in search of the Coral Castle, he feels the target on his back. At Panama, a new leader emerges as an ancient evil threatens Outpost Gateway. The only hope of defeating it is a youth who has learned to survive in the deadly ruins.

On Australia’s Sunshine Coast, King Xavier leads the search for the Coral Castle while Captain Rolo deploys the Hell Divers to hunt for a new source of seeds. As losses from both missions mount, the king wonders if finding this place is worth the cost. But turning back to the Vanguard Islands without a new food source could doom all humanity to starvation. Or to all-out war.

The New York Times and USA Today bestselling series

They dive so humanity survives …

More than two centuries after World War III poisoned the planet, the final bastion of humanity lives on massive airships circling the globe in search of a habitable area to call home. Aging and outdated, most of the ships plummeted back to earth long ago. The only thing keeping the two surviving lifeboats in the sky are Hell Divers—men and women who risk their lives by skydiving to the surface to scavenge for parts the ships desperately need.

When one of the remaining airships is damaged in an electrical storm, a Hell Diver team is deployed to a hostile zone called Hades. But there’s something down there far worse than the mutated creatures discovered on dives in the past—something that threatens the fragile future of humanity.

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Face the uncertain future without fear …

A year has passed since the Hell Divers defeated the machines at Kilimanjaro. The freed captives have settled into their new home at the Vanguard Islands, joining survivors from around the world. But extreme weather and failed crops have raised the specter of famine. Ships must push deeper into dangerous red zones, only to come back with less loot—and fewer soldiers.

When the Hell Divers discover a scroll on a raid, King Xavier is faced with a long-buried truth that threatens the future of his people and all of humanity. The Vanguard Islands are not the salvation the sky people thought them to be. To survive, they must venture through the Panama Canal and into the wastes beyond.

With the future at stake, the Immortal once again dons his armor. But there is a reason the great Cazador armies never returned from the canal, and this time not even the King of the Wastes is prepared for what awaits them.

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They dive so humanity survives. Now they take to the sea.

In the fourth installment of the Hell Divers series, the Sea Wolf sets out to search for the Metal Islands. Leading the expedition is legendary Hell Diver Xavier Rodriguez. After enduring for a decade on the poisoned surface, his survival skills will be put to the test on the dangerous open seas.

But storms, sea monsters, and the cannibalistic Cazadores aren’t the only threat to X and his small crew. Their mission will uncover hard truths about the history of the war that left humankind stranded in the air for centuries. And the fate of those still living on the airships might very well rest on this fragile and perilous journey to find a new home.

The New York Times and USA Today bestselling series

Betrayal and sacrifice in the skies …

Ten years ago, Hell Diver Xavier “X” Rodriguez fell to Earth. Those he left behind went on without him aboard the airship he once called home. Michael Everhart—the boy once known as Tin—has grown into a man and the commander of Hell Diver Raptor Team. While Michael dives to help keep the Hive in the air, Captain Leon Jordan rules with an iron fist at the helm of the ship. But unrest stirs under his strict leadership as a prophecy of hope sweeps the lower decks.

When a mysterious distress signal calls the Hell Divers to the surface, Michael and his loyal team begin to uncover long-buried truths and the secrets Captain Jordan will do anything to keep. They dive so humanity survives … but will they survive the ultimate betrayal?

Nicholas Sansbury Smith delivers another heart-pounding thriller in Hell Divers II: Ghosts, the second book in the acclaimed science fiction series.

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Humanity has finally found a new home, but the price is blood …

After a long, perilous journey, Hell Divers Xavier Rodriguez and Magnolia Katib discover the Metal Islands, a sunny habitable zone where thousands of people live by fishing and farming. But this “paradise” is really a violent warrior society ruled by the cannibal king el Pulpo. For the first time in X’s life, he is forced to lay down his arms and surrender.

Back on the airships, the Hell Divers are recovering from a gruesome discovery at Red Sphere, where they learned the truth about World War III. Now they must fight another war—this time for what remains of their own endangered species. As the battle approaches, alliances will be forged, and others broken.

Forced to fight in the Cazador army, X faces his toughest mission yet. Will he help his people come down from the sky and claim the promised land, or will humanity go extinct?

The New York Times and USA Today bestselling series

They will dive, but will humanity survive?

Left for dead on the nightmarish surface of the planet, Commander Michael Everhart and his team of Hell Divers barely escape with their lives aboard a new airship called Deliverance. After learning that Xavier “X” Rodriguez may still be alive, they mount a rescue mission for the long-lost hero.

In the skies, the Hive is falling apart, but Captain Jordan is more determined than ever to keep humanity in their outdated lifeboat. He will do whatever it takes to keep the ship in the air—even murder. But when he learns the Hell Divers he exiled have found Deliverance, he changes course for a new mission—find the divers, kill them, and make their new ship his own.

In the third installment of the Hell Divers series, Michael and his fellow divers fight across the mutated landscape in search of X. But what they find will change everything.

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While the Hell Divers cross an ocean to battle the machines, an old flesh-and-blood threat returns to the islands.

The mission to Rio de Janeiro ended in victory, but it came at a dire cost, killing most of those who set out to rescue the stranded survivors. Even worse, the skin walkers’ leader, Horn, escaped with his demonic crew and is coming to take the throne.

Back at the Vanguard Islands, King Xavier Rodriguez has been severely injured in another battle to protect the kingdom. Now an infection threatens to kill the one man who can keep the peace. As he fights for survival, new intel from Rio de Janeiro gives humanity hope of destroying the biggest threat of all: the machines—if the machines don’t find the Vanguard Islands first.

The New York Times and USA Today bestselling series

The war for the Metal Islands is over, but the search for survivors has just begun.

After a long and bloody battle, legendary Hell Diver Xavier Rodriguez reigns as the dutiful but reluctant new king of the islands. Advised by a council of former sky citizens as well as Cazadores, he works to assimilate the two societies peacefully. But not all Cazadores have accepted the new order.

While X tries to ease tensions at home, a rookie team of divers, led by Michael Everhart, returns to the skies in Discovery, formerly the ITC Deliverance. Their mission: to locate other human survivors throughout the world and rescue them. But Michael’s team aren’t the only ones searching for survivors. A gruesome discovery reveals that android defectors continue to hunt humans across the globe. And they may not be the only ones.

In a race against time, the Hell Divers may be the only obstacle to enemies bent on wiping out the final pockets of survivors and extinguishing the human genome forever.