Perry Keenlyside

This offers excellent insight into the authors it DOES cover, but SOOOO much is missing (in favor of garbage no one has ever heard of).
No monastic nuns writing from their cloisters in medieval England?
Arthur Conan Doyle presented as a footnote?
NO AGATHA CHRISTIE??
A brief mention of the arrival of children's lit with Robinson Crusoe, but no A. A. Milne? Woefully incomplete.