For more new books about royalty see:
BELGIUM/THE NETHERLANDS
Author: Valerie Vrancken.
Title: De blijde inkomsten van de Brabantse hertogen. Macht, opstand en privileges in de vijftiende eeuw (The Joyful Entrances of the Dukes of Brabant. Power, Rebellion and Privileges in the fifteenth century.
Published: June/July 2018 by Academic and Scientific Publishers.
Language: Dutch.
RUSSIA
Author: translations by Andrew Kahn and Kelsley Rubin-Detlev.
Title: Catherine the Great. Selected Letters.
Published: 1 July 2018 by OUP Oxford.
Language: English.