| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Solstice Evergreen: History, Folklore and Origins of the Christmas Tree | 978-0-944031-75-9 (0-944031-75-7) | 1998 |
| The Solstice Evergreen: History, Folklore, and Origins of the Christmas Tree | 978-0-944031-26-1 (0-944031-26-9) | 1990 |