Also written at an accessible introductory level is the commentary by O. Palmer Robertson. Robertson places the book in the late ninth or early eighth century, in the very early pre-exilic period. He appears also to take the majority view of chapter 1, seeing the description of the locust plague as a reference to literal locusts. Robertson's commentary should be supplemented by his thoughts on the book in his more recent Christ of the Prophets. [Full Review]