This 3-in-1 audiobook box set includes books one through three of the Integrated Universe series, a fantasy LitRPG adventure set in a post-apocalyptic Earth with plenty of monster and dungeon diving. This collection includes King Maker, King of the Mountain, and King of the Continent.

Giant fireblasts tear across the earth as the Gates of Hell are ripped open. In an instant, billions are killed. Human technology becomes utterly worthless in the face of the end of the world. Fortunately for Jaco, he barely survives the opening act of the Apocalypse. Unfortunately for him, he has to live through what comes next. Those who died in the initial blast are reincarnated as undead monsters. Massive fiery pits swallow up the center of every major city across the world.

The entire population of the world that you were born into suddenly transported to another planet, along with the rest of the intelligent inhabitants of the Milky Way Galaxy. A strange System talking to you about abilities and levels without a care for your opinions. Thousands of monster spawning dungeons placed around the new world without a care for the new inhabitants. And if those weren't bad enough, a forced invitation for one thousand random individuals to compete in a livestreamed competition within a dungeon with the rank of Administrator as the prize.

It was supposed to be another boring day at the insurance office for Rico Kline, but powerful forces had other plans for him. Finding himself repeatedly summoned to other worlds as a disposable minion, Rico must face deadly foes, disarm insidious traps, become a test subject, and run the occasional errand for his various summoners. At least when each summoning is over, he’s rewarded and sent back home. But being back home has its own set of problems, and he'll need to grow stronger to face it all.

Leading astrophysicist Liam Jackson is participating in a scientist exchange program in Germany when a curveball of universal proportions is thrown at him. Planes fall from the sky, cars explode, and strange particles rain down from the heavens as monsters appear out of thin air. The laws of physics have changed in the world. The fundamental forces of the universe are behaving differently, and Liam needs to understand them if he wants to survive.

Xavier Collins was sitting in class when the System integrated Earth into the Greater Universe, where countless vast kingdoms, empires, and collectives battle for domination. He didn't know what choosing to be a Champion would entail. He just liked the sound of it. But when he's teleported to the aptly-named Tower of Champions, he must face challenges against those who have known about the System since birth.

Matt plans to delve the rifts responsible for the monsters that destroyed his city and murdered his parents. But his dreams are crushed when his Tier 1 Talent is rated as detrimental and no guild or group will take him. Working at a nearby inn, he meets a mysterious and powerful couple. They give him a chance to join the Path of Ascension, an empire-wide race to ascend the Tiers and become living legends. With their recommendation and a stolen Skill, Matt begins his journey to the peak of power. Maybe then, he can get vengeance he seeks.

The System is here! Most of the population of the planet were suddenly turned into zombies, while the rest acquired new abilities. Abilities that let them run from the zombies, save themselves, hide, and try to survive. But it only takes one bite that almost always means death. Our hero was standing in line when the apocalypse came. He was lucky at first to be caught in a crowd when the zombies tried to bite him on the leg. Really lucky, because those trials unlocked new abilities for him.

When the System Administrators arrived on Earth, they forced those of the younger generation into other worlds to fight for multiversal entertainment. Bored of life on Earth, Noah has trained to become one of the chosen. He even had his class all planned out–a Mounted Monster Tamer. But he was never picked. So he put matters into his own hands and volunteered. Arriving in a world thick with jungle and hotter than the most boiling desert, Noah finds himself face-to-face with a kobold, which he proceeds to beat into submission and turn into a minion.

Dax Tarnis has few rights and fewer options. A Casteless thief, he has struggled his whole life just to put food in his belly, and his dreams and goals have always been far out of reach. It should have been like that forever, but Dax wanted more. And when fate thrusts a rare magic card into his hands, his world is upended. Now, he has the power to change everything. All he needs is to learn how to use it. How to level up. How to fight.

Noah was once a Mecha pilot leading the defense of Earth against the invading Parasites. Now he is just one lone man stranded on a strange planet, with nothing to do but endlessly fight and devour beasts to increase his strength in the hope of leaving that forsaken place. A new opportunity arose the day a spaceship crashed on the planet. Follow Noah as he escapes, enters the wider universe, and discovers the truth about what happened to Earth.

Marc's home from college on break, spending his time laughing about some of the crazy news stories he's found online, and gaming. When a message appears in his line of sight, blocking out absolutely everything else, he nearly freaks out. The message warns that the world has been in a variant Natural Laws beta test for millennia and that it's about to revert to the norms.

Me? I was an innocent bystander in a shootout between mobsters and spawned monsters. Thankfully, the System granted me the power to bring forth monsters from the void. With this ability to command magical beasts, I might just live out the apocalypse. Together with a ragtag group of survivors, we're wading through the mayhem while searching for somewhere safe. Somewhere that monsters aren't desperately trying to kill us, where the opportunistic among humanity aren't looking for easy XP.

Sam was surfing with his cat when the world ended. Suddenly enlisted into a battle to fend off annihilation, Sam seizes the strength of the void to survive. In the aftermath, Sam is thrown into a new world shattered into floating islands with survivors from Earth. Training and fighting with his giant sword and apocalyptic mana alongside his magical healer cat, Sam's unusually quick to adapt to this deadly realm of monsters and magic. With endless threats to face and countless powers to attain, Sam's journey of ascension climbing has only just begun.

Silas is inducted into the System, becoming the last in a long line of Earth's "forerunners." The rewards are great, but the danger is greater. We are not alone in the universe. The fate of five worlds hangs on how their forerunners perform. Will Silas have what it takes to win Earth a place in the multiverse? Or will Earth become another mining world stripped of all resources and left a barren husk floating in the cosmos?