Start with high-confidence 1066 1485 books, then narrow by subgenre or adjacent topics.
Life in a Medieval Castle
Joseph Gies, Frances Gies
The Greatest Knight
Thomas Asbridge, Christopher Tester
Life in a Medieval City
Frances Gies, Joseph Gies
The History of the Kings of Britain
Geoffrey of Monmouth, Lewis Thorpe
The Blood in Winter
Jonathan Healey
Illustrated History of Knights and the Golden Age of Chivalry
Charles Phillips
Queens of the Conquest
Alison Weir, Julia Franklin
Queens at War
Alison Weir
Nemesis
Catherine Hanley, Tina Ross
Bloody Crowns
Michael Livingston
The Little Duke
Charlotte Mary Yonge
Medieval Warfare Illustrated Atlas
Matthew Bennett MA FSA FRHistS, Kelly DeVries
In the Reign of King John
Dan Jones
Anglo-saxon Chronicle
Michael Swanton, Anglo-Saxon Chronicle
The Eagle and the Hart
Helen Castor