Johnny Dixon, Fergie and Professor Childermass comply with a strange will left by the Professor's brother, which requires them to spend the summer at a desolate estate where they encounter a madman bent on destroying the world.
- ISBN10 0141306971
- ISBN13 9780141306971
- Publish Date 1 March 2000 (first published 30 November 1989)
- Publish Status Out of Print
- Out of Print 10 March 2017
- Publish Country US
- Publisher Penguin Putnam Inc
- Imprint Puffin
- Format Paperback (US Trade)
- Pages 160
- Language English