Why market-driven, genre-defined books fail to capture the essence of literature — I recently went through an enjoyable, short period of re-visiting favourite books and reading new ones. Amongst the former were Women, Race, and Class, by Angela Davis, and Purple Hibiscus, by Chimamanda Ngozie. The latter included Zadie Smith’s latest novel, The Fraud, and Americanah, also by Ngozie. So far so…