| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Divided Ulster | 978-0-14-021369-0 | 1971 | |
| Early Christian Ireland | 978-0-500-27110-0 | 1978 | Maire De Paor |
| Ireland and Early Europe: Essays and Occasional Writings on Art and Culture | 978-1-85182-298-0 | 1997 | |
| On the Easter Proclamation: And Other Declarations | 978-1-85182-322-2 | 1997 | |
| St. Patrick's World: The Christian Culture of Ireland's Apostolic Age | 978-1-85182-144-0 | 1996 | |
| Uimhir a Seacht: On Gcroi Nach Dtuigeann | 978-0-01-210016-5 | 2010 | |
Four Courts Press Ltd · Penguin · Thames and Hudson Ltd · Various small imprints