 The Art of Happiness
| 1998 | 33 reads | 3.91 | 322 pages? duration | |
 The Now Habit
| 1988 | 20 reads | 3.65 | 206 pages? duration | |
 Thinking in systems : a primer
| 2008 | 52 reads | 4.22 | 218 pages? duration | |
 Where Good Ideas Come from: The Natural History of Innovation
| 2010 | 29 reads | 3.26 | 326 pages? duration | |
 Sources of Power: How People Make Decisions
| 1998 | 1 read | 0 | 372 pages? duration |