Started reading medieval history books and now I want to have a book on every person (ok, every monarch, I can be reasonable) I’m interested in and can’t believe they don’t exist.
If I can have a great book on Edward I, why can’t I have a similarly detailed on his failure of a son (Edward II) or the French king if the same age (Philip IV the Fair (a.k.a. the Iron King)? 
Once you read 400 pages of witty and clever tale in tiny font, encyclopaedia articles just don’t do it anymore…