 :::* The purpose of categories is to group things of the same type together. Real things with real things. Fictional things with fictional things. Mixing real things and fictional things is a misuse of categories. A real book is not and can never be a fictional library or a fictional librarian.  :::* The category about cities in England is irrelevant, beyond the fact that things that are not cities in England shouldn't be categorized as cities in England.  :::* It's not at all difficult to maintain a category for fictional things. Just don't add real things to it and if real things are added to it, remove them.  :::* But what the fuck ever. Tyranny of the minority is the rule of law on Wikipedia and ultimately you're going to re-add these categories regardless of how wrong and illogical it is. So have at it. Categorize real books as fictional libraries. Knock yourself out.   