| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Subfiles in Free-Format RPG: Rules, Examples, Techniques, and Other Cool Stuff | 978-1-58347-094-7 (1-58347-094-8) | 2011 |
| Subfiles in RPG IV: Rules, Examples, Techniques, and Other Cool Stuff | 978-1-58347-003-9 (1-58347-003-4) | 2000 |