Given God’s intention to rule the church by a written document consisting of his personal words, it would be anomalous in the extreme if he put them in a place where we couldn’t find them. Through OT History, God has taken pains to put these words in an obvious place, the tabernacle, and later the temple. Josephus says that the books kept in the temple, before its destruction in A.D. 70, were the books recognized as canonical by the Jews. Although the Jews read other books for edification, the temple books were those with fully divine authority. So there is no mystery about the extent of the OT canon. God put the books in a place where they could function as he intended, where they would be recognized as his.

John Frame, The Doctrine of the Word of God, 135.