| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Origins of Beowulf: And the Pre-Viking Kingdom of East Anglia | 978-0-85991-472-7 (0-85991-472-0) | 2004 |
| The Origins of Beowulf: and the Pre-Viking Kingdom of East Anglia | 978-0-85991-361-4 (0-85991-361-9) | 1994 |