First a disclaimer: I'm not THAT interested in the British RF so I don't know if anything presented here is true and I'm not going to spend anytime checking it.
The first part of the book, about the historical royals was really interesting. It was mostly what I knew but in more details. I liked learning how the relationship of the RF with the media evolved. The second part, about more present royals was waaay to gossipy and repeated itself quite a bit. Also, I disliked the informal and almost vulgar tone. And I'd like to be able to make my own conclusions instead of being fed them, thank you very much.
Also, pity the book was written some years ago, before the whole Sussexes mess became... well, messier.