When Violet has a numbers problem and Arthur is penniless, they go into business and solve both problems.
- ISBN10 0434946729
- ISBN13 9780434946723
- Publish Date September 1989 (first published 28 October 1981)
- Publish Status Out of Print
- Out of Print 20 December 2007
- Publish Country GB
- Publisher Egmont UK Ltd
- Imprint Heinemann Young Books
- Edition New edition
- Format Paperback
- Pages 64
- Language English