| title | ISBN-13 | year of publication |
|---|---|---|
| Historical Enigmas: Historical Whodunits and Enigmas of History | 978-0-312-37380-1 | 1974 |
| Jeremy Taylor | 978-0-8414-9472-5 | 1973 |
| Lorenzo the Magnificent | 978-0-7181-1204-2 | 1974 |
| The Gunpowder Plot | 978-0-911845-33-4 | 1996 |
| The Young People's Book of Saints | 978-1-933184-62-3 | 2009 |
| Who Was the Man in the Iron Mask? And Other Historical Enigmas | 978-0-14-139097-0 | 2002 |
H. Ross · H.W. · H. Williamson · Hugh Ross · Hugh W. · Hugh Williamson · R. Williamson
Folcroft Library Editions · Michael Joseph · Neumann Press · Penguin · Sophia Institute Press · St. Martin's Press