From the acclaimed Mysteries of Cove series.

In the steam-powered mountain city of Cove, creativity is a crime and “invention” is a curse word. Following clues left by the notorious inventor Leo Babbage, Trenton and Kallista—Leo’s daughter—set out to defy Cove.

Trenton and Kallista head west on their mechanical dragon. They find a blackened forest, some ruins, and an underground city. Caught in a civil war between the Whipjacks and the Order of the Beast, the two meet Plucky, a girl with mechanical legs, and Ander, who claims humans can communicate with dragons. Can they trust anyone?