For more new books about royalty see:
SPAIN
Author: Arnout van Cruyningen.
Title: De Koning van Hispanje. Filips II, verguisd en geëerd (The King of Spain. Philip II, Reviled and Honored).
Publication: 11 February 2021 by Omniboek.
Language: Dutch.
UNITED KINGDOM
Author: Bethan Holt.
Title: The Duchess of Cambridge. A decade of modern royal style.
Publication: 9 February 2021 by Ryland Peters & Small.
Language: English.
UNITED KINGDOM
Author: Elisabeth Basford.
Title: Mary. The First Modern Princess.
Publication: 5 February 2021 by The History Press.
Language: English.
