Honestly why? What is the attraction this family have in airing their dirty laundry? It can’t be for money, he’s wealthy. He must think it’ll be cathartic like his nephew imagined it would be if he told us all “his truth”. More mud slinging. Talk about making a bad situation worse.
Seems it’s now Harry’s uncle - the Earl of Spencer - having his turn at a “tell all” book.
Diana died 29 years ago so I think it's rather late for this book to be considered cathartic.