Anybody who is considering buying this book (and its sequel, if one can find it) should know that it has absolutely no pretensions of being fair or accurate. Despite the wild inaccuracies of now-deceased stars' exploits, the book is still like seeing a car wreck: you know it's awful, but you can't resist looking at it. It's a fun book in spite of itself.
The photos are often tasteless, the prose is often tacky and sleazy, the research is put together with two nails and a hammer, and overall the book reminds one of the old "Confidential" magazines (the magazine is actually profiled in one of the book's chapters). Yet sleaze and tackiness are what Hollywood was all about, so the book seems fitting.
If you want accuracy in a book, go elsewhere. If you like gossip in the most vicious and slimy way possible, then this is your book.