Twelve Minor Prophets

The Minor Prophets or Twelve Prophets (Aramaic: תרי עשר‎‎, Trei Asar, "The Twelve"), occasionally Book of the Twelve, is the last book of the Nevi'im, the second main division of the Jewish Tanakh. The collection is broken up to form twelve individual books in the Christian Old Testament, one for each of the prophets. The terms "minor prophets" and "twelve prophets" can also refer to the twelve traditional authors of these works.

The term "Minor" relates to the length of each book (ranging from a single chapter to fourteen); even the longest is short compared to the three major prophets, Isaiah, Ezekiel and Jeremiah. It is not known when these short works were collected and transferred to a single scroll, but the first extra-biblical evidence we have for the Twelve as a collection is c. 190 BCE in the writings of Jesus ben Sirach, and evidence from the Dead Sea Scrolls suggests that the modern order was established by 150 BCE. It is believed that initially the first six were collected, and later the second six were added; the two groups seem to complement each other, with Hosea through Micah raising the question of iniquity, and Nahum through Malachi proposing resolutions.

Many, though not all, modern scholars agree that the editing process which produced the Book of the Twelve reached its final form in Jerusalem during the Achaemenid period (538–332 BCE), although there is disagreement over whether this was early or late. Scholars usually assume that there exists an original core of prophetic tradition behind each book which can be attributed to the figure after whom it is named. The noteworthy exception is the Book of Jonah, an anonymous work containing no prophetic oracles, probably composed in the Hellenistic period (332–167 BCE).

...
Wikipedia