I have read a lot of books about Marilyn Monroe and I found this one to be well-written and a good read. For this, I would give it four stars,.
However, a lot of the "facts" are based on single person accounts, and the author is given to taking his one source at face value and thereby discounting any conflicting information with sweeping statements. As anyone who knows the life story of Marilyn Monroe knows, there are many contracting stories and while it's easier to just select one and go with that, it doesn't paint the full picture. Also, a lot of information included is taken from research he did for other books, so its effectively second hand. So, for the quality of information included, I would give it two stars, hence my three star rating.
Also, which annoyed me, when you read his acknowledgements at the back, he says he ran out of space and time to include a full list of all materials referenced (which I think affects the credibility) and that he didn't have enough space to include all the material he researched, but he might put it in the paperback! Not such a great thing to read once you have forked out for the hardback.
All in all, a good read. A few nuggets (especially about her early life pre-Jim Dougherty) but no startling revelations - I would hold out for the paperback.