G.S. · Gregory S. · Susanna Gregory
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| A Masterly Murder | 978-0-316-64626-0 (0-316-64626-1) | 2000 |
| An Order for Death: The Seventh Chronicle of Matthew Bartholomew | 978-0-316-85679-9 (0-316-85679-7) | 2001 |
| La Reliquia Di Cambridge | 978-88-502-2638-2 (88-502-2638-1) | 2011 |