Really well researched, beautifully done portrait of an extremely wealthy family and its most eccentric member, Huguette Clark, who lived nearly 105 years. And still didn't spend all of her hundreds of millions of dollars, though she certainly tried.
I thoroughly enjoyed the details of her father's rise to fortune and her relationship, however odd it might seem, with her mother. I'm even glad she took her strangest secrets (seriously, wtf happened with her marriage?) to the grave.
However, if you set out to read it, be aware that the book was published before the battle over the estate was complete, so you'll have to do a little Googling to get the very end of the story.