| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Master Key System by Charles F. Haanel | 978-0-9678514-0-2 (0-9678514-0-8) | 2000 | Charles F. Haanel |
| The Master Key Workbook: A Complete Method of Self-Mastery and Goal Attainment Based on The Master Key System, the Legendary Book by Charles F. Haanel | 978-0-9761111-1-5 (0-9761111-1-X) | 2004 | |