| | 4 | ? pages? duration |
The Leadership Capital Index: Realizing the Market Value of Leadership | 2015 | 0 | 288 pages? duration |
| 1989 | 3.5 | 256 pages? duration |
Leadership BS: Fixing Workplaces and Careers One Truth at a Time | 2015 | 0 | 260 pages? duration |
| 1990 | 5 | 129 pages? duration |
| 1997 | 3.2 | 336 pages? duration |
Personal Development for Smart People: The Conscious Pursuit of Personal Growth | 2008 | 3.67 | 288 pages? duration |