On the first day of school, Mouse is upset when Cat spends time with her old friends.
- ISBN10 0060557222
- ISBN13 9780060557225
- Publish Date 1 July 2005 (first published 28 June 2005)
- Publish Status Out of Print
- Out of Print 16 June 2021
- Publish Country US
- Imprint HarperCollins Publishers
- Format Hardcover (Library Binding)
- Pages 32
- Language English