| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Cracroft's Peerage: A Complete Guide to the British Peerage | 978-0-9542070-1-4 (0-9542070-1-7) | 2002 |
| Cracroft's Peerage: Release 4.2: The Complete Guide to the British Peerage | 978-0-9542070-2-1 (0-9542070-2-5) | 2004 |
C B · P. Brennan · P. C. · Patrick Brennan · Patrick C. Brennan