Anton Seiber, journeyman thaumaturge, has finally escaped his dead-end job identifying bodies in the morgues of London. He’s off to seek a brighter future…or he would be, if he hadn’t just been robbed, mugged, and turned away from the only train that will help him reach that future on time. A random meeting turns into a fight for his life and gifts Anton with two things: a knife that always kills whatever it stabs, and the chance to assume the identity of the man who just tried to kill him and board the train in his place. He wasn’t counting on being found out by a lumière, one of the French emperor’s most powerful and intriguing spies. He wasn’t betting on a murder being committed on the train, or on being asked for his help identifying the culprits. He wasn’t asking to be drawn into a web of simmering insurrection, and he certainly didn’t want to find Lord Lumière so irresistible, but there’s no denying it. Perhaps Anton will even tell him so…if he survives to the end of this journey.

Anton Seiber is on the cusp of finishing his Doctorate of Thaumaturgy, ready to leave university life behind and set out to make his own way in the world. His careful plans are interrupted by the arrival of Camille Lumière, the emperor’s investigator—and Anton’s lover. Camille is in pursuit of a murderer, and needs Anton’s special talents to help track him down. Worse yet, the killer is targeting foreigners with magical abilities—men like Anton himself. If he and Camille don’t find him before he find Anton, his every plan for the future could be in jeopardy…not to mention his life.

All Anton Seiber, newly-minted Master Thaumaturge, wants is to use his training to support himself out in the world. Well, that and to see the man he loves, Imperial Investigator Camille Lumière, more than once every six months. What he gets instead is an invitation to visit L’Institut D’Ingénierie Technologique in Paris, the foremost research institution for thaumaturgy and the arts of war in the world. It’s an offer he can’t turn down…quite literally. Getting to the Institute is a mess that Anton barely survives, and that’s just the beginning of his troubles. Drawn into a web of lies and betrayals, Anton will have to use every trick he can conjure to survive—and perhaps hand over the most diabolical spell in the world in exchange for saving the life of someone he loves.

Anton Seiber, Master Thaumaturge and reluctant architect of the French Empire’s newest weapon of war, is on the verge of collapse. It wouldn’t be so bad if his blood wasn’t required to power the spell revolutionizing the battlefield, or if he were allowed to communicate with his friends and family, or if he could see his lover Lord Camille Lumière, special investigator for the emperor himself, more than once every few months. As it is, he’s barely holding himself together. He’s determined to make it through…until an accident in the laboratory leads to his collapse. Camille is a loyal servant of the empire, but it will take more than a war to keep him away from Anton. He returns to find his lover on the brink of death, and it takes Camille’s special “gift” to keep him alive. He is ordered to leave Anton behind and return to service—the future of the empire, and everyone “gifted” like him, might depend on it. There’s only one thing to do: escape to England with Anton. If only they weren’t surrounded by armed guards, dangerous magic, deadly cannons and, oh yes—a war for control of the entire continent.