| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Hillwalking in Wales: Arans - Dovey Hills v. 1 | 978-1-85284-467-7 (1-85284-467-1) | 2006 | |
| HIllwalking in Wales: Festiniog - Tarrens v. 2 | 978-1-85284-468-4 (1-85284-468-X) | 2006 | |
| L.E.O.: The Incredible Story of the World's First Business Computer | 978-0-07-009501-4 (0-07-009501-9) | 1997 | John Aris · Frank Land |