Adamant Media Corporation · Dover Publications · Weiser Books
| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Secret Societies of the Middle Ages: The Assassins, the Templars & the Secret Tribunals of Westphalia | 978-1-57863-334-0 | 2005 |
| The Crusaders; or, Scenes, Events, and Characters, from the Times of the Crusades | 978-1-4212-6477-6 | 2005 |
| The Knights Templar and Other Secret Societies of the Middle Ages | 978-0-486-45476-4 | 2007 |
| The World Guide to Gnomes, Fairies, Elves & Other Little People | 978-0-517-26313-6 | 2000 |