Having read all ten of these books I can agree with the sentiment that i didn’t “regret” reading them, however describing them as “productivity” is a poor classification. Personal Effectiveness is a much better description. People often use “productive” and “effective” interchangeably but they really aren’t remotely the same thing. Productivity is related to quantity of output, whereas Effectivness is the act of using ones creative energy for the highest value. If in the same amount of time/effort you can make 100 worthless “widgets” or 1 excellently made product which should you pursue? One sounds “productive” whereas the other is “effective”.