J. E. · Joost Elfers · Joost Elffers
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The 48 Laws of Power | 978-1-86197-278-1 (1-86197-278-4) | 2000 | Robert Greene · Joost Elffers |
| The Secret Language of Destiny: A Personology Guide to Finding Your Life Purpose | 978-0-670-03263-1 (0-670-03263-8) | 2003 | Gary Goldschneider |
| The Secret Language of Relationships: Your Complete Personology Guide to Any Relationship with Anyone | 978-0-670-03262-4 (0-670-03262-X) | 2003 | " |