(picture taken from the website of the publisher Methuen)
Believing the biographic note, Nicholas Courtney is not a philatelist. It's just a writer, passionate by history and the Royal family. He had access to the Philatelic Collection, and received the help of every philatelic curators and libraries you can find in London : Royal Archives, Keeper of the Collection, Royal Philatelic Society London, British Library.
The book follows the main actors who has been constituting this collection, since Alfred, the Duke of Edinburgh until Queen Elizabeth II (to only names Royals), illustrated by items of the Collection.
This wealth of referenced informations is a dream for an historian philatelist, but moreover, for a young French philatelist, the book is not hidden in a corner of a stamp dealer or send with a big price tag during a sale after the emptying of a collection. Published in 2004, he is available right now at amazon.com for 39,95 dollars (27,51 €), and used at amazon.co.uk.
I hope for great French philatelists, specialised but readable by all public writer, to see their books be published and made available like that in France. I will certainly have to wait Godot... or Mister Brun (who will certainly receive my visit soon for his second edition of Faux et truqués about stamp falsification, that he has the kindness to print again).