Evelina Cooper, niece of Sherlock Holmes, is ready for her first London Season - except for a murderer, missing automatons, a sorcerer, and a talking mouse. In a Victorian era ruled by a ruthless steam baron council, mechanical power is the real monarch, and sorcery the demon enemy of the empire. Evelina has secretly mastered a coveted weapon - magic that can run machines. Should she trust the handsome, clever rake who speeds her breath, or the dashing trick rider who would dare anything she would ask?

As part of her devil’s bargain with the industrial steam barons, Evelina Cooper is finally enrolled in the Ladies’ College of London. However, she’s attending as the Gold King’s pet magician, in handcuffs and forbidden contact with even her closest relation, the detective Sherlock Holmes. Not even Niccolo, the dashing pirate captain, and his sentient airship can save her. But Evelina’s problems are only part of a larger war. The Baskerville Affair is finally coming to light, and the rebels are making their move to wrest power from the barons and restore it to Queen Victoria. Missing heirs and nightmare hounds are the order of the day—or at least that’s what Dr. Watson is telling the press. But their plans are doomed unless Evelina escapes to unite her magic with the rebels’ machines—and even then her powers aren’t what they used to be. A sorcerer has awakened a dark hunger in Evelina’s soul, and only he can keep her from endangering them all. The only problem is…he’s dead