My 16yo would like to read some fictionalised history books. She's read the feminist greek myth retellings by Madeline Miller and Jennifer Saint (yes, I've pointed out those are completely fictional) and has enjoyed a few of Dominic Sandbrook Adventures in Time books, and Laura Ingalls Wilder and Judith Kerr's fictionalised biographies. She says she doesn't want to read about completely fictional characters.
I'm trying to think of books that aren't as heavy going as Hilary Mantel but can only think of Philippa Gregory. Any good suggestions? She's not fussy about period but would prefer books about women.