| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2002 | 978-0-9820137-0-0 | David Allen | GTD® System Guides |
| 2008 | 978-0-9820137-1-7 | David Allen - Author of Getting Things D | GTD Weekly Review (3 CD Audio Set) |
| '' | 978-0-9820137-2-4 | David Allen - Author of "GTD" | GTD® Live - Audio Seminar (Ten CD set) |