second of 12 Old Testament books that bear the names of the Minor Prophets. The Jewish canon lumps all together as The Twelve and divides Joel into four chapters; Christian versions combine chapters 2 and 3.

The book relates nothing about Joel except his name and that of his father. An analysis of the text further indicates that Joel lived during the period of the Second Temple of Jerusalem (516 BC–AD 70), for his book reflects the liturgy then in use.

The book's central theme is a concept borrowed from preexilic prophets that salvation will come to Judah and Jerusalem only when the people turn to Yahweh. Then they will not only receive divine favour, but the land itself will become fertile.