Zack's exciting saga continues as he and the Vikings head for Niflheim, Norse land of the Dead, in search of the second treasure in the Lost Boy prophecy.
- ISBN10 0142500313
- ISBN13 9780142500316
- Publish Date 28 July 2003
- Publish Status Out of Print
- Out of Print 14 May 2014
- Publish Country GB
- Imprint Puffin Books
- Format Paperback
- Pages 184
- Language English