What's the difference between the twenty-fourth and twenty-fifth histories?

Twenty-five histories refer to the twenty-four histories written by King James, supplemented by a "history".

Twenty-four histories refer to Historical Records, History of Han, History of Later Han, History of the Three Kingdoms, Book of Jin, Book of Wei, Book of Beiqi, Book of Zhou, Book of Song, Book of Nanqi, Liang Shu, Book of Chen, Book of Beiqi and Book of Song. Exactly how many volumes are needed (not ancient volumes, but modern bound volumes) is hard to say. If it is the classical Chinese version of Zhonghua Book Company (there is no vernacular), it will be 3.4 meters on the bookshelf (I just measured it).

You weigh it accordingly!

As for the number of volumes of Historical Records, there are different versions, mainly due to the losses and remedies in circulation. Ban Gu wrote in The Biography of Sima Qian in Han Dynasty: "Ten articles are missing, and there are records but no books." Many people in the Eastern Han Dynasty and later generations made up for it. If your version has the words "Mr. Chu said", it is a patch version of the Eastern Han Dynasty. So it's hard to say how many volumes there are in Historical Records. Let's see if it is mended. Who fixed it?