As they escape the underground kingdom of the trolls, the young heroes will need aid from beyond the stars if they hope to prevail in this final battle against ancient evil.
- ISBN10 1406247294
- ISBN13 9781406247299
- Publish Date 14 September 2012 (first published 1 January 2012)
- Publish Status Out of Print
- Out of Print 6 July 2021
- Publish Country GB
- Publisher Pearson Education Limited
- Imprint Raintree Publishers
- Format Paperback
- Pages 112
- Language English