A deep dive into the text of Richard III's personal prayer and Book of Hours
The late Anne F. Sutton was a historian focusing on Richard III and medieval history. She was a trustee and founder of the Richard III and Yorkist History Trust and a Fellow of the Royal Historical Society, as well as the editor of The Ricardian, journal of the Richard III Society.
Livia Visser-Fuchs is a medival historian with numerous articles and publications to her name.