Griffin, a young bat, is sucked into the "Underworld," and his father follows to rescue him.
- ISBN10 0689869886
- ISBN13 9780689869884
- Publish Date 4 May 2004 (first published 1 January 2000)
- Publish Status Out of Stock
- Publish Country US
- Imprint Aladdin Paperbacks
- Format Paperback (US Trade)
- Pages 317
- Language English