| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Under Celtic Skies 2017 Calendar | 978-1-910862-22-3 (1-910862-22-3) | 2016 |
| Under Celtic Skies 2018 Calendar | 978-1-912050-96-3 (1-912050-96-X) | 2017 |
| Under Celtic Skies Calendar 2016 | 978-1-909823-54-9 (1-909823-54-6) | 2015 |