The humans on the Sentinel Battle Station have waited a decade in silence for their enemy's return - a merciless, bird-like alien species known as Apex, who are bent on exterminating all other sentient life in the quadrant. But when a strange warship appears, the crew is thrown into chaos as one faction is desperate to communicate with the newcomers, and the other will kill to keep their mission a secret. For the crew of HMS Blackbeard, a Royal Navy warship light years from home, the battle station may be their salvation.

Flying at the helm of a powerful battle cruiser, former pirate Catarina Vargus leads a collection of colonists, miners, engineers, and navy personnel to establish an outpost far beyond the frontier. The Royal Navy needs a forward operating base in their war against the alien race known as Apex, who has vowed to exterminate all sentient life in the quarter. Catarina's expedition soon draws the attention of Scandian marauders, driven from their home worlds by plague and war in search of plunder.

Markal, an apprentice wizard, is thrust unexpectedly to the head of his order when his master is decapitated by a gray-skinned assassin. The order's walled gardens have the power to restore their dead master to life, but only if the apprentices can protect his body long enough for their sanctuary to work its magic. When a barbarian warrior named Bronwyn invades the gardens wielding a soul-binding sword and accuses the order of harboring a powerful sorcerer, Markal thinks she is another assassin come to finish the job.

In the aftermath of an interstellar war with an alien race, Captain James Drake is unjustly court martialed. But Drake won't go down without a fight. Rather than surrender, he'll lead his loyal crew into the frontier worlds to repair and rearm. Fighting the treacherous Lord Admiral Malthorne, Drake makes alliances with aliens and smugglers to clear his name and defeat treason in his beloved homeland.

From beyond the galaxy. From beyond human understanding. They came with one mission. To kill us all. Some call them aliens. Others call them gods. Their tentacles grip worlds. Their malice destroys civilizations. They've crushed a million planets. Now they crave Earth. Marco and Addy, veterans of the Alien Wars, are retired. They fought for many years. They saved Earth many times. Now they're raising their children in a peaceful forest. They've earned this peace. But Earth needs them. More than ever. Because a war is coming. A war unlike any before. A war that can devour our very galaxy.