Joel is a Biblical prophet, the second of the Twelve Minor Prophets, and, according to itself, the author of the Book of Joel, which is set in the early Assyrian period. Scholars meanwhile view the Book of Joel as having been completed in the Ptolemaic period due to its use of earlier texts and perspective on Yahweh and the nations. c. 100 BC – c. 700 BC; died at about -600. Wiki link