Military Space Opera

The Solarian League lies in defeat, crushed by the Grand Alliance of Manticore, Haven, and Grayson. Obedient to the Alliance's surrender demands, the League is writing a new Constitution, to prevent the reemergence of out-of-control bureaucrats, like the "Mandarins" who led it to disaster. Frontier Security has been disbanded, the outer worlds have regained control of their own economic destinies, and multiple star systems will soon secede from the League entirely.

Thawed out after a century of cryogenic sleep, Captain John “Black Jack” Geary has led the Alliance fleet through Syndicate Worlds space, thwarting the enemy at every turn—even within his own ranks—during the long journey home. Alliance prisoners of war are being held at a labor camp in the Heradao Star System, which also happens to be the location of the majority of the surviving Syndic warships. Determined not to leave any of his people behind, Black Jack Geary orders the fleet to strike hard and fast to rescue the POWs with minimal Alliance losses.

Dark secrets lurk in the Fallen Dome of Periculus, and Tempes Sol of the Guild of Light seeks them out to cement his place in the underhive - if he, and Hive Primus itself, can survive what he unleashes.

Three years ago, as Ship's Mage of the starship Blue Jay, Damien Montgomery was pursued to the edge of human space by both the agents and enemies of the Mage-King of Mars—before being brought in from the cold.

Commander Joe Pikeman has his share of demons. But after a long deployment, he just wants to enjoy some home leave with his daughter. The galaxy has other plans. His last assignment takes him to Earth, humanity’s deserted homeworld. There, he finds Earth’s last settlement littered with the bodies of the people who lived there. As he hunts down those responsible, he runs head-first into some galaxy-shaking questions.

Imperial Death Dealer Ethan Wolfe has been dispatched to kill a terrorist at the edge of the galaxy. It was a simple mission until the Emperor and his Lord Commander outlawed and condemned him to death, without any reason. But as he goes on the run, with Hope Adair, a former smuggler, Ethan learns that his dead father was not an archaeologist but an agent of the Empire with a terrible secret. And that secret will lead him on a quest to find an ex-Imperial soldier and a being called the Guardian. Little does he know that he has a big role to play in the coming Great War with the Fallen.

The heliopause protected Earth, keeping us safe from a violent galaxy. Or so we thought. Who knew it did more than keep us guarded? Who understood that its integrity was the only thing holding our beginner’s protection in place? If we'd known—if we’d understood, we’d have waited longer, a hell of a lot longer to pierce its veil. But when the USM Arrowheart passed through it and left our solar system, that protection ended and all hell broke loose. The aliens who'd been watching, waiting, and biding their time were ready. We weren’t. But there was hope.

Kylie Rhoads is a junker. She makes her living traveling the stars, salvaging abandoned ships left over from pirate attacks on the edge of the Gedri system. Some of the hulls are legal for the taking, most aren't. When a salvage job goes bad, Kylie finds herself on the wrong end of a gun. The hand holding that gun? The SA Space Force, just the people Kylie wants to avoid. To avoid prison, Kylie makes a deal to go deep into the Gedri System and rescue a simple girl. But out on the fringe, nothing is as it seems.

One planet. Three sapient species living peacefully together. And one deadly virus that could wipe out every world in the Starways Congress, killing billions. Is the only answer another great Xenocide?

Captain Jacob Brown knew something was up when the United Earth Navy sent two capital warships to their small outpost base. Nobody ever came out to Mosler Station unless they had to. Scout Team Obsidian was scheduled to stand down after two lengthy deployments, letting the team recuperate and rest, but leadership had other ideas. A prototype weapon system has been stolen from Earth, and Obsidian is being called up to track it down.

The Ixa smashed the galaxy to bits before they were defeated. Captain Husher has sounded the alarm in the decades since: the Ixa’s creators will return to finish the job. But unlike Husher, the galactic government didn't battle the Ixa, and the politicians have convinced themselves that maintaining peace means limiting the ability to wage war.

Hidden aboard the USS Enterprise is a secret that has been passed from captain to captain, from Robert April to Christopher Pike to James T. Kirk. Now the return of the enigmatic woman once known as Number One has brought that secret to light, and Kirk and his crew must risk everything to finish a mission that began with April so many years ago.

For years, Starfleet Intelligence agents have carried out undercover assignments deep within the Klingon Empire. Surgically altered and rigorously trained in Klingon culture, they operate in plain sight and without any direct support, while collecting information and infiltrating the highest levels of imperial power. Their actions have given Starfleet valuable insight into the inner workings of Klingon government and its relentless military apparatus. After three of Starfleet’s longest serving agents fear exposure, they initiate emergency extraction procedures.

The Imperium's attempts to defeat the ork menace seem doomed to failure; it is only a matter of time before the greenskins triumph, and mankind is wiped from the galaxy. Yet there is some cause for hope - the psychic weakness of the orks has been found, and a few Sisters of Silence survive. Supported by the full might and technology of the Adeptus Mechanicus, the Space Marines head to the orks' home world one final time. This time there will be no retreat, no surrender. They must succeed...or die in the attempt.

In Battle Station, Kyle Riggs faces new challenges, new alien fleets, and learns the secrets behind the war he has been fighting for years. In the fifth book of the Star Force Series, the Eden system is in humanity's grasp, but can they keep it? Star Force is weak after a long war, and many yearn to go home. Knowing the machines will return with a new armada eventually, Riggs seeks a more permanent solution. Along the way, worlds are won and lost, millions perish, and great truths are revealed.

Born to oppression, Siena is an ordinary young woman, until an act of defiance leaves her scarred and marked as a rebel. She's sold to Ero, a fallen Krey with a desperate plan to redeem his once-powerful family. He intends to enhance slaves by altering their genetic code, increasing their value through an illegal experiment.

One hundred years ago, 4 crewmembers of the U.S.S. Enterprise™ crossed the dimensional barrier and found a mirror image of their own universe, populated by nightmare duplicates of their shipmates. Barely able to escape with their lives, they returned, thankful that the accident which had brought them there could not be duplicated...or so they thought. But now the scientists of that empire have found a doorway into our universe. Their plan is to destroy from within, to replace a Federation Starship with one of their own.

The complete Baldwin's Legacy series.

From the deep void, the Xaros came for humanity. Unfeeling, uncaring drones swept over humanity's nascent presence in the outer solar system. When word reached Earth… we weren't ready. Only one man knew the truth of the threat and he was powerless to help anyone survive. Strike Marines fight through Los Angeles under assault by murderous drones. A fighter pilot determined to reunite with his family. Armor soldiers stand against the darkness. This is the story of the Fall of Earth.

Wildcat colonies are illegal, unauthorized, and secret - so when an injured stranger shows up at the wildcat colony New Seattle, the colony leaders are understandably suspicious of who he is and what he represents. His story of how he’s come to their colony is shocking, surprising, and might have bigger consequences than anyone could have expected. Walk the Plank is a tale from John Scalzi's The Human Division, a series of self-contained but interrelated short stories.