Twelve-year-old Petra, accompanied by her magical tin spider, goes to Prague hoping to retrieve the enchanted eyes the Prince of Bohemia took from her father, and is aided in her quest by a Roma boy and his sister.
- Genre: Juvenile Fiction
- Subgenre: Family / Parents, General, Science Fiction + Fantasy + Magic, Action + Adventure / General
- Age: 9-12 years
- Publisher: Square Fish
- Pages: 265
- Language: English
- Format: paperback
- Release Date: February 2, 2010
- Date Published: February 2, 2010
- Author: Marie Rutkoski