The Scofield Bible Commentary, by Cyrus Ingerson Scofield, , at sacred-texts.com
Book Introduction - Micah
Micah, a contemporary of Isaiah, prophesied during the reigns of Jotham, Ahaz, and Hezekiah over Judah, and of Pekahiah, Pekah, and Hoshea over Israel Kg2 15:23-30; Kg2 17:1-6. He was a prophet in Judah Jer 26:17-19 but the book called by his name chiefly concerns Samaria.
Micah falls into three prophetic strains, each beginning, "Hear":
1. (Micah 1:1 - 2:13)
2. (Micah 3:1 - 5:15)
3. (Micah 6:1 - 7:20)
The events recorded Micah cover a period of 40 years (Ussher).