In the sequel to The Diamond Thief (2014), Remy Brunel has remained in London with J and Thaddeus, while Claudette, Amelie, and the circus have returned to France. As much as she cares for Thaddeus, Remy realizes he may never be able to trust her. Since she misses her circus friends and the excitement of performing, Yannick the magician convinces her to return with him to France. Sneaking away in spite of Thaddeus' warning not to trust Yannick, Remy falls into an evil trap that endangers her and those she loves. A bizarre blimplike aircraft, gold-plated robot soldiers, and volcanic mountains of evil intent, as well as romance, intrigue, and the promise of another Remy and Thaddeus adventure, combine to satisfy the youngest steampunk readers.

Famed French jewel thief and acrobat Rimy Brunel (The Diamond Thief) is determined to discover the truth of her origins, even as she is pursued by police and manipulated by a hypnotist. Gosling crafts a world full of steampunk-style mechanisms and criminal intrigue, and though it is occasionally difficult to track the many characters in this sequel, it's an entertaining, fast-paced ride.