Upon arriving in the Romany homeland to deliver the Mercator Globes, Petra Kronos, Tomik, and Neel formulate a plan to save Petra's father, who has been transformed into a Gray Man. But when a long-held secret is revealed, Neel finds hims...

When Prince Rodolfo's monsters attack her, Petra Kronos is spirited away to London.  As she struggles to escape, Neel and Tomik sail the high seas, in search of her. Though separated by many miles, the three friends...

Petra Kronos has a simple, happy life. But it’s never been ordinary. She has a pet tin spider named Astrophil who likes to hide in her snarled hair and give her advice. Her best friend can trap lightning inside a glass sphere. Petra also...