The adventures of a nine-year-old twin brother and sister who, despite constant bickering, support each other loyally at home and at school.
- ISBN10 0688216889
- ISBN13 9780688216887
- Publish Date 1 February 1967
- Publish Status Out of Print
- Out of Print 8 July 2021
- Imprint William Morrow & Company
- Format Hardcover
- Language Chinese