Who can help me identify the value dynasty of this ancient book, and whether it has the significance of value-added and collection?

This is a bound volume of two books. The upper part is a book, and the lower part is a book. To be sure, the following book is the Book Collection written by Cai Shen and Zhu's disciples of the Song Dynasty. The Collection and Biography of Book Classics is to collect all biographies (the explanations of Shangshu) made by various schools and put forward their own views. This book is the representative work of Confucian scholars studying Shangshu in the Song Dynasty, and later became the standard annotation of Shangshu in the imperial examination. The above part should also be a comment on Shangshu, but I don't know which one it belongs to. This engraving should be from the Qing dynasty, and the book is not good. A book engraved with two books is not a hardcover book, which means it may be produced by Xiaoyinfang.