Arthur views his little sister in a different light after receiving a revealing letter from his pen pal.
- ISBN10 0437901084
- ISBN13 9780437901088
- Publish Date 22 August 1977 (first published 1 January 1976)
- Publish Status Transferred
- Publish Country GB
- Publisher Egmont UK Ltd
- Imprint Heinemann Young Books
- Format Hardcover
- Pages 64
- Language English