| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2001 | 978-0-9713038-0-5 | Angelo I George | The saltpeter empires of Great Saltpetre Cave and Mammoth Cave |
| '' | 978-0-9713038-1-2 | '' | Outer door to the auger hole--and beyond: The exploration of Wyandotte Cave |
| 2005 | 978-0-9713038-2-9 | Angelo I. George | Mammoth Cave Saltpeter Works |