Lately, Linda Acaster has been reading "faction". This is the art of fictionalising recorded facts about real people, usually now dead, to give an insight into their life and times, written in such a way as to challenge the reader to discern the fact from the fiction.
It's not a sub-genre of the historical novel that she's normally drawn to. As she maintains in her blogpost, no matter the amount of research undertaken, no writer is going to get all the details correct.
But does it matter? And why the sudden interest? Check out her blogpost to see if you agree.