the 20 80 principle

This has been the most painful and well-researched book I have ever written. There is a certain irony here, since the 80/20 Principle tells us that I
could have obtained a book 80 per cent as good in 20 per cent of the time.This would certainly have been my inclination and only the reader can tell
whether the extra effort has been worthwhile. I think it has, but I have lost all objectivity. The effort involved has been much more collective than for any of my previous books. Don’t believe the false modesty of those who write generously that their books have been ‘team efforts’. In the end only an author (or authors) can write a book. But I want to thank some individuals without whom this book would either not have existed or would have been vastly inferior