The Superscription (1:1):

1:1  Amos is introduced to us by a number of editors, probably from Judah, who have, over a period of time, formulated the superscription as we now have it. Probably the original heading of the book read something like, “The words of Amos from Tekoa.” The NIV mistakenly connects the shepherds with Tekoa, but of Tekoa modifies Amos, and the reference to the shepherds simply states Amos’s occupation. The facts that the reign of Jeroboam II of Israel is synchronized with that of Uzziah of Judah, and that Uzziah is mentioned first, point strongly to an addition by the southern kingdom’s postexilic Deuteronomic editors, who framed the entire history of Israel and Judah in such terms in the books of Kings (e.g., 2 Kgs. 14:23; 15:1). Two years before the earthquake makes …