What to read after Summary of Laurence J. Peter & Raymond Hull's The Peter Principle?

Please note: This is a companion version & not the original book. Sample Book Insights: #1 I was taught that the more you know, the farther you go, so I stayed in school until I graduated from college. I then went forth into the world, clutching firmly these ideas and my new teaching certificate. #2 There is always someone who is incompetent at their job. I found that employees move up through a hierarchy, but after they are promoted, they become more incompetent. #3 The average customer cares little about perfection. They want their car back on time. Most of Goodwin’s men are less interested in motors than their paychecks. #4 The Peter Principle states that in every hierarchy, employees will eventually be promoted to positions of incompetence. The Principle explains that some employees, like Ellipse and Cube, reach a level of incompetence in the lowest grade and are never promoted.