| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The 70 Greatest Conspiracies Of All Time: History's Biggest Mysteries, Coverups, and Cabals | 978-0-8065-2033-9 (0-8065-2033-7) | 2000 |
| The Sixty Greatest Conspiracies of All Time: History's Biggest Mysteries, Coverups, and Cabals | 978-0-8065-1833-6 (0-8065-1833-2) | 1996 |