You said the book was "unauthorized" in order to advance in argument that it was inaccurate. I simply pointed out that, far from being completely "unauthorized," his widow and son cooperated in the writing of the book.
A lot of talented people were/are bastards in real life: Miles Davis, Warren Zevon, Frank Sinatra spring immediately. Why do you need to cling to the fiction they weren't in order to enjoy their music?