| title | ISBN-13 | year of publication |
|---|---|---|
| A Grammar of Modern Cornish | 978-1-902917-00-9 | 2001 |
| Language Ladder: Pt. 1: Skeul an Yeth | 978-0-907064-21-3 | 1996 |
| Language Ladder: Pt. 2: Skeul an Yeth | 978-0-907064-50-3 | 1997 |
| Skeul an Yeth . A complete course in the Cornish Language. Lyver Tri - Book Three. | 978-0-907064-84-8 | 1998 |