Gregory King is the author of the UK bestseller The Duchess of Windsor: The Uncommon Life of Wallis Simpson, as well as several books on Russia's Romanov era, including The Court of the Last Tsar and The Fate of the Romanovs (with Penny Wilson). A frequent on-screen commentator for royal television productions, he has worked with the BBC and ITV in the UK, the CBC in Canada, and with National Geographic, the Learning Channel, the History Channel, the Discovery Channel, and A&E in the United States.