| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Gus and Duncan's Comprehensive Guide to Star Wars Collectibles | 978-0-9820826-0-7 (0-9820826-0-6) | 2009 | |
| Gus and Duncan's Guide to Star Wars Cast & Crew Items | 978-0-9820826-2-1 (0-9820826-2-2) | 2012 | Gus Lopez · Mattias Rendahl |
| Gus and Duncan's Guide to Star Wars Prototypes | 978-0-9820826-1-4 (0-9820826-1-4) | 2010 | |