John Walker has 13 audiobooks on Listento.it, narrated by 7 narrators. The most-rated is Clouds of War.

Nations poise on the verge of war but a few loose ends remain before they can take to the battlefield. Captain Warren Miller and the Leviathan crew join forces with the assassin Prin Garinta to enact a dangerous mission behind enemy lines. With two battleships providing cover, they must find the shadowy organization behind most of the mischief throughout the universe. Meanwhile, the imperial government reels from the assassination attempt on King Malnik Keth. He has stepped up, shedding the ties of those who tried to control him in an effort to gain total control over his kingdom. As a seemingly innocent man rots in their prison, he must decide if he wants to risk the truth coming out after punishing him or hunt down the true culprits. Back on Earth, Icarus Rising increases their attacks, inching ever closer toward their ultimate objective. Their eyes are on the Agency headquarters and everything within. A tense waiting game may culminate to an ultimate battle between the terrorists and the military...or it could all be ended in a swift raid on a lonely cottage in the hills.
©2019 John Walker (P)2020 Whoami Publishing

Earth's resistance is taking shape, finding a solid footing in their preparation to defy their enemies. They have multiple obstacles yet to overcome, not the least of which being an enemy patrol scouring systems for their secret base. As they prepare an offensive to prevent their discovery, they will come face to face with their first real military opponents. Tensions rise for King Malnik when he meets with the Border Dukes, intent on winning them to his side. He continues to work with his fiance, intent on regaining control of his position from his intelligence advisor, using his own agent to investigate the mysterious disappearances of multiple ships. Meanwhile, authorities on Earth continue their investigation into the dangerous terrorists intent on destroying the Space Agency’s ability to function. Their desire is to rob humanity of their ability to travel in space, to engage in intergalactic politics and they will stop at nothing, not even murder, to achieve this goal.
©2019 John Walker (P)2020 Whoami Publishing

Captain Warren Miller and the crew of the Leviathan return home triumphant from their first mission amongst the stars. They bring with them hope from the religious cathedral world and look toward the future. As the threat of war looms over Earth, they can’t be sure when the enemy will return or how long they have. In their goal to find additional allies, they plot a course for Lantha station, social hub of the Border Dukes, a semi-independent group that currently operates outside the mandates of the royal empire. Here, they hope to find potential friends against the royal military. While they are still under the radar, they must act fast to bolster their defenses. The force behind the throne works to consolidate power while hunting for threats outside their borders. As a famed military commander begins to defy the throne, he becomes the object of search for numerous parties. His death or salvation may turn the tide of an upcoming war.
©2019 John Walker (P)2019 Whoami Publishing

Violence comes to a head. Humanity poises on the verge of open warfare, standing alongside their new allies. Their plan is to attack the main capital, the home of the empire itself but before they can make it happen, the Gellan people fall under attack. The assault appears to be an attempt to commit genocide, forcing the allies hand to rush to their defense. Meanwhile, Earth faces down the threat of Icarus Rising. The terrorist organization makes their play, bringing everything to bear to destroy the Agency once and for all. Each party moves into position, ready for what may well be the endgame. For the crew of the Leviathan they find themselves facing down their first real interstellar conflict. As the armies massed, the result may well determine the fate of the entire galaxy.
©2019 John Walker (P)2020 Whoami Publishing

The Leviathan has returned successful from their mission to gather more allies, but with that, they uncovered disturbing intelligence. A secret world, hidden away by the royal empire, seems to be used specifically for some type of collection - perhaps the rarest of all, the ability to rejuvenate vitality and life. Captain Warren Miller sets them on a mission to uncover the truth behind these rumors, but it comes with considerable danger. They must go deep behind enemy lines, facing threats they cannot anticipate. Avania insists on going with, adding to the risk but both of them have their reasons for wanting answers. Meanwhile, royal assassin Prin Garinta continues her hunt for Avania, uncovering a shadowy organization that may well control the royal government. Unbeknownst to her, the king and his bride to be set out to establish their own agent so they might exercise their will beyond the throne. As they fend off the watchful eye of the intelligence advisor, they must risk much to wrest control of the government back into noble hands.
©2019 John Walker (P)2020 Whoami Publishing

It all comes down to this. The Leviathan prepares to join the final battle against the royal empire, joining forces with their allies for a dramatic fight that will shape the entire galaxy. They face a desperate enemy, one willing to do anything to hold them at bay, including throwing away lives and resources in the effort. As the vast armada launches the assault, they know full well that defeat would spell disaster for dozens of worlds, especially Earth. Back home, the investigators track down the traitor who nearly destroyed the Agency along with the elusive leader of Icarus Rising. Their efforts take them to an old house but their adversaries are onto them as well, leading to a violent confrontation that could spell death for everyone involved. As the war picks up, two crack teams are sent to rescue the high priestess from an assault on the cathedral. They arrive to find the planet war torn, the security forces scattered but an old ally steps up to help. Will their daring attack lead to a victory or has the royal military already won? The grand finale is here.
©2019 John Walker (P)2020 Whoami Publishing

Information is power. The crew of the TCN Triton look to uncover the secrets of the Kahl artifact they’ve brought on board. With a hint of what comes next, they turn to the expertise of a Vorka field scientist, a scholar of history. He resides on a quiet settlement in Rhulin space, a place where he might study in peace. But the Kahl have other plans, laying siege to the world. With the the scientist on the run and multiple vessels battling near orbit, this quiet researcher has become the center of attention. With more on the line than a few lives, the humans and their allies must conduct a daring mission to not only recruit their VIP, but to save the entire settlement in the process. Meanwhile, behind enemy lines in the Kahl empire, a lone intelligence agent continues her hunt for the elusive prophet. Pushing her way into the graces of a suspected criminal, she looks to move her way up the ranks so she might silence this rebel faction, once and for all.
©2020 John Walker (P)2020 John Walker

Earth has bolstered some support, but their burgeoning resistance is far from prepared to take on the true enemy. Still under the radar, they make a bid to bring another race to their side. The Gellan people have suffered under constant collection, leveling their population, but they are also known to be neutral to the affairs of the galaxy. Meanwhile, not all is well in other parts of the galaxy. The terrorist group Icarus Rising builds support even as the Agency attempts to track down their elusive leader, Phoenix. The royal assassin, Prin, continues her search, unknowingly following the footsteps of Avania and the Leviathan. And King Malnik prepares to select his new bride, solidifying his rule. Tensions rise throughout the galaxy and one starship from Earth may very well be the tipping point that ignites an intergalactic war.
©2019 John Walker (P)2019 Whoami Publishing

Desperation mounts as the resistance stands betrayed. Their two leaders, Queen Avania in exile and General Atalis, are taken hostage by a former ally. Captain Warren Miller rushes to their rescue, beginning an investigation as to where they might’ve been taken. If they fail, they may well doom their burgeoning rebellion. The clock is ticking as every second puts the prisoners further out of reach. But another side is on the case. Prin Garinta and her small band need a way to join the rebels. The only way they believe they can be trusted is if they return the people to their rightful place. Using their own resources, they head out, risking everything in a gamble that could well cost them their liberty if not their very lives. All the while, trouble brews on the imperial home world as the investigation continues into the attempted assassination of King Malnik and his fiance. With no one to trust and his only ally recovering from her injuries, Mal finds himself in the unenviable position of relying solely on himself to move forward. But can he uncover the threat to the throne while keeping track of everything else threatening his position?
©2019 John Walker (P)2020 Whoami Publishing

Commander Titus Barnes struggles to save his ship. War brews on the horizon and the crew of the TCN Triton get caught in the middle. When they answer a distress call from one of their colonies on the edge of their space, they end up outmatched and outgunned by an unknown force. This conflict may well push humanity into a new age...or spell the beginning of the end for their race. Meanwhile, two archaeologists work to uncover evidence of alien life on a far off planet. As they make what might be the biggest discovery of the human race, their activities trigger an alert, drawing dangerous forces to investigate. Cut off from any quick help and on their own, they must use every trick at their disposal to stay alive.
©2020 John Walker (P)2020 John Walker

A year has passed since an alien invasion left Earth with staggering losses but it has been time well spent. Salvaging parts from their attacker, humanity has reverse engineered much of the advanced technology, leapfrogging years of research. Now, having adapted faster than light travel for their own ends, they are finally prepared to leave their own solar system. And none too soon. A distress signal is discovered by a salvage crew, a message from a nearby star system under siege by raiders. This pushes the timetable, forcing humanity to make their journey sooner than anticipated. Their goal is build an alliance with other benevolent races, to secure friendship against an inevitable future attack. Helping fend off criminals seems like a perfect first step toward that end. But when they arrive, they find their opponents are hardened professionals, dangerous and willing to fight to the death. As the human crew finds themselves in a vicious battle, they must pull out all the stops, using all their military experience to stand against the threat. A loss would be catastrophic not only for the culture they’re trying to help but for the very future of humanity.
©2019 John Walker (P)2020 Whoami Publishing

A massive sphere appears near Earth, defying all attempts to communicate or understand its purpose. Power outages plague key cities and military bases, causing wide spread panic and chaos. Only the Space Agency seems to have a grasp on the situation but with all their combined resources, they’re baffled. Captain Warren Miller races to join his colleagues in the Agency headquarters, hoping to convince his superiors to launch their latest space craft, the battle cruiser Leviathan, which may be able to defy this intruder. In the absence of communication, he hopes a little intimidation might bring about a conversation. But then smaller objects descend upon the Earth, grabbing up people from all over the globe. Captain Miller never makes it back to base, forcing the Agency to scramble for a response. With the weight of an expectant world beating down on them and the alien threat looming above, they have no choice but to engage the enemy or simply witness history in the making.
Public Domain (P)2020 Whoami Publishing

The Triton follows the clues discovered in an ancient, alien key intent on discovering the history of their enemies. The trip takes them to a world populated by a forgotten tribe of beings lost to the sands of time. An ancient temple hides information they desperately need to uncover the next step in their quest. But they aren’t the only ones on the hunt. Old enemies pursue a similar path while threats on the surface both conventional and otherwise bar their path. Every member of the human crew will find themselves tested, pushing them to the limits as they fight not only for their objective but their very lives. Elsewhere in the universe, the hunt for the mystical Prophet continues. A POW struggles to unify other prisoners in an effort to escape and a Prytin vessel finds itself behind enemy lines, squaring off with a dangerous foe.
©2020 John Walker (P)2021 John Walker