| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Otto Rahn And The Quest For The Grail | 978-1-931882-82-8 (1-931882-82-7) | 2008 |
| The Mystery of U-33: Hitler's Secret Envoy | 978-1-935487-10-4 (1-935487-10-8) | 2010 |
N.G. · Nicola Gardini · Nicola Giardina · Nicola Giordano · Nicole Gaertner · Nicole Gardner · Nigel Gardner