The Celestial Globe — Marie Rutkoski

After stealing her father's eyes back from Prince Rodolfo, Petra Kronos lives in constant danger. She and her tin spider, Astrophil, end up hiding out in London, where she learns more about her magical abilities. London has its charms (like Petra's attractive fencing master), but Petra needs to get back to Bohemia and her father. Meanwhile, Prince Rodolfo is trying to locate a powerful object called the Celestial Globe. Petra's friends, Tomik and Neel, are searching for her and traveling with a band of Gypsies searching for the globe. The race is on to see who will find the globe first, and who will make it out of this deadly chase alive.