Despite the authors' insistence that they don't want the book to be a collection of meandering (and contradictory) anecdotes, it's largely what it is. And that's what makes this hilarious, gossipy, and slightly cracked book so great.
The commenter who writes that the book is boring misses that this is a very exciting book--not to mention misses the fact that the "bits and pieces" of information are not something to complain about, but to enjoy. More, they support the general thesis that artists come in all stripes. Rather than there being a constant artistic temperament or constitution that transcends the ages, artists have ranged from being mad as hatters to being astutely calculating businessmen. This may sound obvious to some, but it needed proving, and the Wittkowers do it. They soundly rebut the unacknowledged modern and contemporary assumption that artists as a class are somehow weird or at least radically different from everyone else. A truly great book--one I have enjoyed simply for pleasure and, as a university professor, a book I've used as a course textbook, on multiple occasions, with great success.