What punctuation marks should be used in Twenty-four History? Title?

Twenty-four histories are the collective names of twenty-four history books, so double quotation marks should be used. Just like "Four Cardinal Principles", "Five continents" and "Four oceans".

It is easy for people to misunderstand that since the twenty-four histories are all books, don't they need a title? Actually, it is not. Ba Jin's novels have a "torrent trilogy" and Mao Dun's novels have a "rural trilogy". We won't give these trilogy titles, we can only use double quotation marks.