In Ecclesiasticus (an Apocryphal book written c. 190 b.c.), Jesus ben Sira spoke of “the twelve prophets” (Ecclesiasticus 9:10) as a unit parallel to Isaiah, Jeremiah and Ezekiel. He thus indicated that these 12 prophecies were at that time thought of as a unit and were probably already written together on one scroll, as is the case in later times. Josephus (Against Apion, 1.8.3) also was aware of this grouping. Augustine (The City of God, 18.25) called them the “Minor Prophets,” referring to the small size of these books by comparison with the major prophetic books and not at all suggesting that they are of minor importance.
In the traditional Jewish canon these works are arranged in what was thought to be their chronological order: (1) the books that came from the period of Assyrian power (Hosea, Joel, Amos, Obadiah, Jonah, Micah), (2) those written about the time of the decline of Assyria (Nahum, Habakkuk, Zephaniah) and (3) those dating from the postexilic era (Haggai, Zechariah, Malachi). On the other hand, their order in the Septuagint (the pre-Christian Greek translation of the OT) is: Hosea, Amos, Micah, Joel, Obadiah, Jonah, Nahum, Habakkuk, Zephaniah, Haggai, Zechariah, Malachi (the order of the first six was probably determined by length, except for Jonah, which is placed last among them because of its different character).
In any event, it appears that within a century after the composition of Malachi the Jews had brought together the 12 shorter prophecies to form a book (scroll) of prophetic writing, which was received as canonical and paralleled the three major prophetic books of Isaiah, Jeremiah and Ezekiel. The great Greek manuscripts Alexandrinus and Vaticanus place the Twelve before the major prophets, but in the traditional Jewish canon and in all modern versions they appear after them.
© Zondervan. From the Zondervan NIV Study Bible. Used with Permission.