Henry Morgan went to a baseball game hoping to catch a pop fly - not an untimely death from a flying lawnmower to the head. It's the lawnmower he gets. But he doesn't stay dead. Instead, he wakes up to find that a century has passed, and he's being drafted to be the governing AI for humanity's first interstellar starship.

As a Marine, Henry Morgan would have said it was more likely he’d die from enemy fire than from being struck by a flying lawnmower while at a baseball game. But it was the lawnmower that ended up taking him out. A century later, Henry wakes up as a reconstituted intelligence, and is promptly drafted to be the governing AI for America’s first military starship. After decades of model-trained AIs wreaking havoc across the globe, humanity is ready to try something a little more…human.

They say you can’t go home again… …especially if you’re the governing mind for an interstellar military starship. It's official: Sergeant Henry Morgan has now spent more time as a starship than he spent dead. His mission is more than a century old, but in some ways, he feels like it's just begun. A desperate distress call from Earth has brought him back to his old cosmic stomping grounds, for your standard save-humanity-from-extinction-by-alien-constructs operation.

When your starship's computer undergoes a catastrophic meltdown, light years from help, it's bad. When you are that ship's computer, it's worse. Fresh from the destruction of the colony they were assigned to protect, the UES Interchange is now hurtling toward Proxima Centauri, there to rally reinforcements against the tide of revolutionary rage currently rocking the galaxy. But when they arrive, they find the heart of galactic civilization eerily quiet...and empty. At the same time, Sergeant Henry Morgan, the ship's computer, is utterly unresponsive.

Corthaur's proxies wage a brutal campaign across a string of star systems, leaving colonies and stations burning in their wake...oblivious that they're advancing nothing except the Enemy's cause. Meanwhile, in the darkness, Corthaur quietly gathers his enslaved legions for a final assault that promises to end freedom forever. In the middle of it all, the Interchange fights to weather the riptide of interstellar events.