[MarjaE]

I keep running into this problem when using a single Calibre library for all genres--

I am trying to find a book covering one obscure topic. I haven't listed the topic in my Calibre tags. I try to find relevant keywords using Finder or another search-by-content tool.

Sometimes I find nothing.

Sometimes I find many results, most of which are on unrelated topics, and most of which lack the search terms... (Exact search? Who needs that? You need more results!)

If I could search genre x + content y, that would help narrow things down. So maybe I should split my Calibre library into several libraries, by genre or groups of genres. If I did that, I could run the search on the folder/directory for the right library and ignore the rest.

Except I don't know if multiple Calibre libraries can update Kindle collections without cancelling the other libraries' collections. I know multiple virtual libraries couldn't a few years ago.