Having been used by the King to trick a unicorn into imprisonment, Zoe decides to set him free again.
- ISBN10 0439112044
- ISBN13 9780439112048
- Publish Date 1 April 2000 (first published 4 November 1999)
- Publish Status Active
- Publish Country US
- Imprint Arthur A. Levine Books
- Edition AMERICAN ed.
- Format Hardcover
- Language English