In the early days of the Civil War, rumors of gold in the frozen Klondike brought hordes of newcomers to the Pacific Northwest. Anxious to compete, Russian prospectors commissioned inventor Leviticus Blue to create a great machine that could mine through Alaska’s ice. Thus was Dr. Blue’s Incredible Bone-Shaking Drill Engine born. But on its first test run the Boneshaker went terribly awry, destroying several blocks of downtown Seattle and unearthing a subterranean vein of blight gas that turned anyone who breathed it into the living dead. Now it is sixteen years later, and a wall has been built to enclose the devastated and toxic city. Just beyond it lives Blue’s widow, Briar Wilkes. Life is hard with a ruined reputation and a teenaged boy to support, but she and Ezekiel are managing. Until Ezekiel undertakes a secret crusade to rewrite history. His quest will take him under the wall and into a city teeming with ravenous undead, air pirates, criminal overlords, and heavily armed refugees. And only Briar can bring him out alive.

Maria Isabella Boyd's success as a Confederate spy has made her too famous for further espionage work, and now her employment options are slim. Exiled, widowed, and on the brink of poverty...she reluctantly goes to work for the Pinkerton National Detective Agency in Chicago. Adding insult to injury, her first big assignment is commissioned by the Union Army. In short, a federally sponsored transport dirigible is being violently pursued across the Rockies and Uncle Sam isn't pleased. The Clementine is carrying a top secret load of military essentials—essentials which must be delivered to Louisville, Kentucky, without delay. Intelligence suggests that the unrelenting pursuer is a runaway slave who's been wanted by authorities on both sides of the Mason-Dixon for fifteen years. In that time, Captain Croggon Beauregard Hainey has felonied his way back and forth across the continent, leaving a trail of broken banks, stolen war machines, and illegally distributed weaponry from sea to shining sea. And now it s Maria's job to go get him. He's dangerous quarry and she's a dangerous woman, but when forces conspire against them both, they take a chance and form an alliance. She joins his crew, and he uses her connections. She follows his orders. He takes her advice. And somebody, somewhere, is going to rue the day he crossed either one of them.

Stonewall Jackson survived Chancellorsville. England broke the Union’s naval blockade, and formally recognized the Confederate States of America. Atlanta never burned. It is 1880. The American Civil War has raged for nearly two decades, driving technology in strange and terrible directions. Combat dirigibles skulk across the sky and armored vehicles crawl along the land. Military scientists twist the laws of man and nature, and barter their souls for weapons powered by light, fire, and steam. But life struggles forward for soldiers and ordinary citizens. The fractured nation is dotted with stricken towns and epic scenes of devastation–some manmade, and some more mysterious. In the western territories cities are swallowed by gas and walled away to rot while the frontiers are strip-mined for resources. On the borders between North and South, spies scour and scheme, and smugglers build economies more stable than their governments. This is the Clockwork Century. It is dark here, and different.

Mercy Lynch is working at a war hospital in Richmond, Virginia, when she learns that her husband has died in a POW camp and her estranged father is gravely injured and wishes to see her. With no good reason to stay in Virginia, Mercy sets out to see her father in Seattle. But crossing the country is no small task; it's a harrowing adventure through war-torn border states by dirigible, rail, and the Mississippi River. And once Mercy finally arrives in St. Louis, the only Tacoma-bound train is pulled by a terrifying Union-operated steam engine called the Dreadnought. Lacking options and running out of money, Mercy buys a ticket and climbs aboard. What ought to be a quiet trip turns deadly when the train is beset by bushwackers, then vigorously attacked by a band of Rebel soldiers. The train is moving away from battle lines into the vast, unincorporated west, so Mercy can't imagine why it's meeting such resisitance. Perhaps it has something to do with the mysterious cargo in the second and last train cars? Mercy is just a frustrated nurse who wants to see her father before he dies. But she'll have to survive both Union intrigue and Confederate opposition if she wants to make it off the Dreadnought alive.

The third book in the Clockwork Century series, following Cherie Priest's steampunk adventure—and runaway hit—Boneshaker and its sequel, Dreadnought The air pirate Andan Cly is going straight. Well, straight er . Although he's happy to run alcohol guns wherever the money's good, he doesn't think the world needs more sap, or its increasingly ugly side-effects. But becoming legit is easier said than done, and Cly's first legal gig―a supply run for the Seattle Underground―will be paid for by sap money. New Orleans is not Cly's first pick for a shopping run. He loved the Big Easy once, back when he also loved a beautiful mixed-race prostitute named Josephine Early―but that was a decade ago, and he hasn't looked back since. Jo's still thinking about him, though, or so he learns when he gets a telegram about a peculiar piloting job. It's a chance to complete two lucrative jobs at once, one he can't refuse. He sends his old paramour a note and heads for New Orleans, with no idea of what he's in for―or what she wants him to fly. But he won't be flying. Not exactly. Hidden at the bottom of Lake Pontchartrain lurks an astonishing war machine, an immense submersible called the Ganymede . This prototype could end the war, if only anyone had the faintest idea of how to operate it…. If only they could sneak it past the Southern forces at the mouth of the Mississippi River… If only it hadn't killed most of the men who'd ever set foot inside it. But it's those "if onlys" that will decide whether Cly and his crew will end up in the history books, or at the bottom of the ocean.

Rector “Wreck ’em” Sherman was orphaned as a toddler in the Blight of 1863, but that was years ago. Wreck has grown up, and on his eighteenth birthday, he’ll be cast out out of the orphanage. And Wreck’s problems aren’t merely about finding a home. He’s been quietly breaking the cardinal rule of any good drug dealer and dipping into his own supply of the sap he sells. He’s also pretty sure he’s being haunted by the ghost of a kid he used to know—Zeke Wilkes, who almost certainly died six months ago. Zeke would have every reason to pester Wreck, since Wreck got him inside the walled city of Seattle in the first place, and that was probably what killed him. Maybe it’s only a guilty conscience, but Wreck can’t take it anymore, so he sneaks over the wall. The walled-off wasteland of Seattle is every bit as bad as he’d heard, chock-full of the hungry undead and utterly choked by the poisonous, inescapable yellow gas. And then there's the monster. Rector's pretty certain that whatever attacked him was not at all human—and not a rotter, either. Arms far too long. Posture all strange. Eyes all wild and faintly glowing gold and known to the locals as simply “The Inexplicables.” In the process of tracking down these creatures, Rector comes across another incursion through the wall—just as bizarre but entirely attributable to human greed. It seems some outsiders have decided there’s gold to be found in the city and they’re willing to do whatever it takes to get a piece of the pie unless Rector and his posse have anything to do with it.

Ex-spy ‘Belle Boyd’ is retired – more or less. Retired from spying on the Confederacy anyway. Her short-lived marriage to a Union navy boy cast suspicion on those Southern loyalties, so her mid-forties found her unemployed, widowed and disgraced. Until her life-changing job offer from the staunchly Union Pinkerton Detective Agency. When she’s required to assist Abraham Lincoln himself, she has to put any old loyalties firmly aside – for a man she spied against twenty years ago.Lincoln’s friend Gideon Bardsley, colleague and ex-slave, is targeted for assassination after the young inventor made a breakthrough. Fiddlehead, Bardsley’s calculating engine, has proved an extraordinary threat threatens the civilized world. Meaning now is not the time for conflict. Now Bardsley and Fiddlehead are in great danger as forces conspire to keep this secret, the war moving and the money flowing. With spies from both camps gunning for her, can even the notorious Belle Boyd hold the war-hawks at bay?

The Ranger On the island of Galveston, off the coast of southeast Texas, lies a hotel called the Jacaranda. In its single year of operation, two dozen people have died there. The locals say it's cursed. The Rangers say that's nonsense, but they know a man who might be willing to investigate. Horatio Korman crosses the water from the mainland, and hopes for the best. The Nun But the bodies pile up, and a hurricane is brewing up fast. One of the Jacaranda's guests sees time running out, so she seeks an authority of a different sort: a priest from El Huizache who is good at solving problems and keeping secrets. Eileen Callahan has a problem to solve, and a secret to keep. She crosses her fingers, and sends a message that could save them all. The Padre Juan Miguel Quintero Rios broke a promise to the Virgin, and so he was punished...but his intentions were pure, so he was also blessed. Now he walks the southwest with second sight and a tattoo across his back: ''Deo, non Fortuna''—By God, not chance. The former gunslinger crosses himself, and makes for the Jacaranda Hotel. Novella takes place 20 years after the events of Fiddlehead, and will be unrelated to the main arc.