The Jewel of the Kalderash / Rutkoski, Marie

In this final installment of the fantasy trilogy, Petra and her friends embark on a mission to rescue her father who has been transformed into one of Prince Rodolfo's Gray Men. As Prince Rodolfo grows stronger, Petra becomes involved with deadly conspiracies and spies; and she and each of her friends are forced to make life-changing decisions in the face of danger.

Fourteen-year-old Petra, her tin spider Astrophil, and their friends become entangled in the competition for the Roma crown and set out for Prague in hopes of finally finding a cure for Petra's father.