An enjoyable and readable social history, from the earliest monarchs of England through to (almost) the present day. It's not salacious, and doesn't in fact go beyond the bedroom door. Although it's not a formal history with lists of sources etc, it is clearly based on legitimate historical sources such as diaries, letters, newspapers, pamphlets etc, some of which are quoted. And although some of the information is perhaps based on gossip or conjecture of the times, it still gives an interesting picture of the public opinions and feelings about the various monarchs. But there are also numerous items that are well-recognised as fact.
As the introduction explains, the sex lives of monarchs are in fact of public interest (to an extent LOL) because the succession needs to be assured. And there have many moments throughout British history when the succession was in dispute or doubt. This led to coups or even war on occasion, and it's therefore historically significant. But it's also very interesting!!
I knew about the famously 'bad behaviour' of some of England's monarchs, but this book was a bit of an eye-opener for me. It's quite extraordinary really, how many of the monarchs or their relatives had adulterous affairs, mistresses galore, illegitimate children etc etc. And often it was quite blatant and open.
I was also surprised at the number of monarchs or their relatives who were gay, lesbian or bisexual, sometimes quite openly, sometimes just 'rumoured' to be so. The monarchs would have to marry and ensure the succession, but some of them still happily kept their retinue of gay (or other) lovers. It was against church and state, but it still happened.
There are some very funny moments in the book too. Across the ages, pundits and wits have written some very humorous (and disrespectful) doggerel and commentaries about the (mis)behaviour of their monarchs. e.g. A newspaper wrote "There is nothing between the Prince of Wales and Lillie Langtry ... not even a sheet."
Overall, quite a fascinating and enjoyable read, and I will now have a look at the author's other books in this series e.g. his books about the sex lives of Hollywood idols in the pre #MeToo age. Could be interesting if a little scary! Another world, another time.