Mr. Oldcastle and Gumdrop are off for a quiet day in the country, investigating some rather mysterious crop circles. Their quiet day turns to absolute mayhem with the arrival of some fellow vintage car enthusiasts from the planet Mars!
- ISBN10 0340714867
- ISBN13 9780340714867
- Publish Date 11 November 1998
- Publish Status Out of Print
- Out of Print 8 January 2003
- Publish Country GB
- Publisher Hachette Children's Group
- Imprint Hodder Children's Books
- Format Paperback
- Pages 32
- Language English