On Christmas Eve, Jack and Annie's tree house transports them to King Arthur's castle at Camelot, where they undertake a quest to the castle of the Otherworld
- ISBN10 9862160454
- ISBN13 9789862160459
- Publish Date 1 February 2008 (first published 14 December 2004)
- Publish Status Unknown
- Imprint Xiao Tian Xia/Tsai Fong Books
- Format Paperback (US Trade)
- Pages 240
- Language Chinese