| title | ISBN-13 | year of publication |
|---|---|---|
| A Handbook of West Country Brythonic: The Forgotten Celtic Tongue of South West England c.700 A.D. | 978-1-897999-06-6 | 1996 |
| An Introduction to Malagasy: The Language of Madagascar | 978-1-897999-15-8 | 1997 |
| A Preliminary Dictionary of Persons and Places in Ethiopic Literature | 978-1-897999-86-8 | 2013 |
| The Mercian Language: An Introduction to the English Midlands Dialect of Late Anglo-Saxon and Early Middle English | 978-1-897999-39-4 | 2004 |