Two kids Kara, a girl from our world, and Prince Fred, a royal boy from the kingdom of Heldstone join forces to save Urth.
- ISBN10 0553534025
- ISBN13 9780553534023
- Publish Date 8 November 2016
- Publish Status Remaindered
- Imprint Delacorte Press
- Format Hardcover
- Pages 288
- Language English