A twelve-year-old slave on a gigantic, traveling "wagon city" joins forces with a new--and magical--slave, and as they plan their escape they encounter mystery, enchantment, and deadly monsters while their one chance for freedom draws ever nearer.
- ISBN10 0547370253
- ISBN13 9780547370255
- Publish Date 28 February 2012 (first published 1 January 2012)
- Publish Status Active
- Publish Country US
- Imprint Houghton Mifflin
- Format Hardcover
- Pages 304
- Language English