I recently finished "The keeper of lost things" by Ruth Hogan and was discussing it with the missus who works at the library when she said it was a 'women's book' and I was unusual in that I read a number of books by women, 'But you are quite 'Womanly' in some ways'. It surprised me, but she assures me that most men mostly read books by men, and quite a few exclusively so. TBH it had never occurred to me to look at the sex of an author, and when I think back to my early reading I worked my way through Dorothy Sayers, Margery Allingham, Ngaio Marsh et al avidly age about eleven or twelve when I finished with 'Children's' books. How about you? Do you differentiate between men's and women's books?