This would actually just be a list of less well known but still popular books. Probably 90+% of books published are "obscure" in the sense that they didn't bec

This would actually just be a list of less well known but still popular books. Probably 90+% of books published are "obscure" in the sense that they didn't become best sellers and won't be recognized by the average person or likely mentioned in a list like you requested. Most books just don't become popular enough to be well known. Which I think is a tough benchmark.