The Kronos chronicles

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.

Thirteen-year-old Petra, her tin spider Astrophil, and their Roma friends Neel and Tomik are surprised by revelations about Dee, Kit, and Petra's father as they face Prince Rodolfo of Bohemia, who will do anything to possess a powerful object, the Celestial Globe.

When the prince of Bohemia steals her father's eyes, enchants them, and wears them, Petra Kronos sets out to Salamander Castle in order to take her father's eyes back.