Sorting Books

 I'm still trying to categorise books in Calibre. We are not helped here by publishers tagging for SEO and everything having ALL the tags. But also because of things like, "What does Literary" mean? Does it mean "prose that might be poetry" or "stuff that's too turgid to read" or "ignores conventions of punctuation or grammar" or what? Is it even a useful category? Should we use it to mean "does interesting things with the language and the form"?