PRE-ORDER | March 2026
 
The second book in T Kingfisher's thrilling and darkly comical Clocktaur War duology, The Wonder Engine finds Slate and her crew in the city where the Clockwork Boys are created but with her own history threatening to compromise their whole mission.
In this brilliant sequel to Clockwork Boys, old foes resurface, and Slate and Caliban are forced to deal with the echoes of their past choices. From New York Times bestselling, Nebula and Hugo Award-winning author T. Kingfisher.
Slate and her crew have arrived in Anuket City, the town of artificial marvels where Clockwork Boys are created. But the secret of their creation is as mysterious as ever. Slate has a history in Anuket City, history which just won’t leave her alone. And her increasing attraction to Caliban is driving her up the wall. Caliban is, of course, too noble to do anything about it.
As Slate’s history in the city becomes more entangled with their mission, the group’s chances of survival are getting ever slimmer. If they’re to stand a chance of destroying the Clockwork Boys, Slate must confront her past, and find a way to stop it from killing them all.