Okay, this may turn into a long winded review but trust me it should be worth it!
I bought the book expecting a lot I must admit, the title intrigued me and the little quiz the TRF gave use just sparked my interest even more. So I decided to purchase as my summer is getting long and boring.
My biggest problem with the book is the errors in the writing and the facts, to list but a few;
1 - "Queen Elizabeth II is the starting point for any discussion of Western Monarchy - and not only because she is Europe's longest reigning Monarch", I double checked with Artemisia and a few other boffins on European Monarch and as I though, Louis XIV, King of France was Europe's longest reigning monarch.
2 - "While Queen Elizabeth has had to contend with the odd intruder in the palace, there have been no attempts on her life" I assume he doesn't include Marcus Sarjeant who fired 6 blank shots at The Queen during the 1981 Trooping.
3 - He's talking about Mary and Frederik of Denmark "Yet they reportedly employ twenty five staff including maids, nannies for their three children" As far as I can remember Josephine and Vincent are twins, you can't have had one without the other.

4 - He's now talking about King Haakon of Norway, his wife Queen Maud and their son Olav and how Olav may not have been Haakons child. "The strange assertion was based on examination of the royal couple's travel records, which Bomann-Larsen said showed that Olav had not been with his wife at the time the baby was thought to have been conceived" Possibly because Olav is Maud's son, not her husband.
5 - Discussing the birth of Prince Willem-Alexander in 1967 the author says "he (referring to Prince Claus) and Juliana produced a baby boy, Willem Alexander". They mixed up Juliana with her daughter Beatrix.
To name but a few, the book is also laced with grammatical errors, missing words, incomplete sentences that I cannot understand. Not to mention the use of titles which are completely messed up from one chapter to the next. This might seem nitpicky to some but I sort of expected this author to get the details correct, this book must have taken a while to complete and a while to check, so I don't see why so much has gone un-noticed.
Also - in the last chapter, Conradi sees into the future and describes the life of King William V of England and Wales. I find it highly amusing and that it added nothing to the book.
All in all, I was disappointed it didn't tell me anything new, it was like a chronology of the royal families through the ages and how they have dealt with the media, wars, divorce etc. Nothing I didn't know already, and nothing I couldn't have found out for free. I would give it a 3 out of 5, but anyone wanting to buy it wait until it drops in price, paying £14 was a rip off!