And some of the chief of the fathers, when they came to the house of the LORD which is at Jerusalem, offered freely for the house of God to set it up in his place:Ezra 2:68 Parallel Commentaries

The Historical Books.
1. In the Pentateuch we have the establishment of the Theocracy, with the preparatory and accompanying history pertaining to it. The province of the historical books is to unfold its practiced working, and to show how, under the divine superintendence and guidance, it accomplished the end for which it was given. They contain, therefore, primarily, a history of God's dealings with the covenant people under the economy which he had imposed upon them. They look at the course of human events on the …
E. P. Barrows—Companion to the Bible

The Old Testament Canon from Its Beginning to Its Close.
The first important part of the Old Testament put together as a whole was the Pentateuch, or rather, the five books of Moses and Joshua. This was preceded by smaller documents, which one or more redactors embodied in it. The earliest things committed to writing were probably the ten words proceeding from Moses himself, afterwards enlarged into the ten commandments which exist at present in two recensions (Exod. xx., Deut. v.) It is true that we have the oldest form of the decalogue from the Jehovist …
Samuel Davidson—The Canon of the Bible