| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Happy Days for Mr. Mugs | 978-0-7702-0228-6 | 1976 | Martha |
| Mr. Mugs and the Blue Whale: Level Two | 978-0-7702-0222-4 | 1976 | " |
| Mr. Mugs is Lost! | 978-0-7702-0229-3 | 1976 | " |
| Mr. Mugs Plays Ball: Level 2 | 978-0-7702-0221-7 | 1976 | " |