As has been suggested in this series, that remarkable book described in the familiar King James Version as "The Book of the Prophet Isaiah" is considered by competent scholars to cover a wide period of Israel's eventful history.
There is little question that the major part of the first thirty-nine chapters came from the pen of "Isaiah the son of Amoz" (Isa. 1:1), who lived in the eighth century B.C. and had to deal with the persistent attacks of the Assyrian empire against his country. In fact, the Assyrians are mentioned some forty times in these first thirty-nine chapters.
In verse 6 of Chapter 39, there is found a severe warning to King Hezekiah that dangers and difficulties are forthcoming from a new quarter: "Behold, the days come, that all that is in thine house, and that which thy fathers have laid up in store until this day, shall be carried to Babylon: nothing shall be left, saith the Lord."