For more new books about royalty see:

DENMARK
Author: Anne Hedeager Krag.
Title: Dronningens Kirketekstiler (The church textiles of the Queen).
Publication: 24 February 2022 by Gyldendal.
Language: Danish.

FRANCE
Author: Shelley Pulak.
Title: The Dark Queens. The bloody rivalry that forged the medieval world.
Publication: 22 February 2022 by Bloomsbury Publishing (USA)/3 March 2022 by Apollo (UK).
Language: English.

ROMANIA
Author: Diana Mandache.
Title: Ileana Principesa Romaniei – Spitalul Inima Reginei (Ileana Princess of Romania).
Publication: 9 February 2022 by Corint Books.
Language: Romanian.

RUSSIA
Author: Bryn Turnbull.
Title: The last Grand Duchess. A novel of Olga Romanov, imperial Russia and revolution.
Publication: 8 February 2022 by Mira books.
Language: English.

UNITED KINGDOM
Author: Brian Hoey.
Title: Her Majesty Queen Elizabeth II. Platinum Jubilee celebration. 70 Years: 1952-2022.
Publication: 1 February 2022 by Pitkin.
Language: English.

UNITED KINGDOM
Author: Michelle Morgan.
Title: When Marilyn met the Queen. Marilyn Monroe’s life in England.
Publication: 17 February 2022 b y Little, Brown Book Group.
Language: English.

UNITED KINGDOM
Author: Edzard Ernst.
Title: Charles, The Alternative Prince. An Unauthorised Biography.
Publication: 1 February 2022 by Imprint Academic.
Language: English.

UNITED KINGDOM
Author: Frances Dimond.
Title: Queen Alexandra. Loyalty and Love.
Publication: 28 February 2022 by History and Heritage Publishing.
Language: English.

UNITED KINGDOM
Author: Paul Kendall.
Title: Queen Victoria: Her life and legacy.
Publication: 2 February 2022 by Frontline Books.
Language: English.

UNITED KINGDOM
Author: Amy Licence.
Title: Tudor Roses. From Margaret Beaufort to Elizabeth I.
Publication: 15 February 2022 by Amberley Publishing.
Language: English.

UNITED KINGDOM (Nobility)
Author: Sarah J. Hodder.
Title: Cecily Bonville-Grey, Marchioness of Dorset. From riches to royalty.
Publication: 25 February 2022 by John Hunt Publishing.
Language: English.

UNITED KINGDOM (Nobility)
Author: Jane Dismore.
Title: Tangled souls. Love and scandal among the Victorian aristocracy.
Publication: 17 February 2022 by The History Press.
Language: English.
It would be so great if the Diana Mandache book on Ileana eventually has an English edition. I used to have fun chats with her second husband Dr. Issarescu when he was quite elderly, but being a real āold world gentlemanā he was very reticent to speak of Ileana or her family, other than of Queen Marie. He had a trove of Ileana/Marie letters which he showed me. Many dealt with the queen’s persecution by King Carol in her last years. Hopefully Ileana’s son Dominic now has the letters and hopefully shared them with Ms. Mandache, as he came from New York to take what he wanted from Ileana-related materials that were were in Dr. Issarescu’s home when his second wife Patricia passed away a few years ago.
Unfortunately there are hardly books in English about the Romanian royal family I think. I would certainly be interested in reading some of them.