The twelve minor writing prophets have shorter books than the major prophets. These writing prophets range from the 8th to the 5th century BCE. These include Hosea from the 8th century BCE, Joel from the 8th -5th century BCE, Amos from the 8th century BCE, Obadiah and Jonah from the 6th century BCE, Micah and Nahum from the 8th century BCE, Habakkuk and Zephaniah from the 7th century BCE, Haggai and Zechariah from the 6th century BCE, and Malachi from the 5th century BCE. Some of these prophets had an influence on New Testament Christian writers.
The later prophets are what we normally think of as prophets. They stood out against authority and asked people to reform their ways to that of Yahweh, their God. They were writing prophets, as opposed to the early prophets who did not write, but were written about. These later prophets are normally divided into the three major prophets and the twelve Minor Prophets. There were three famous major writing prophets whose works are very long. Isaiah lived in the 8th century BCE, but his work was not finished until around the 6th century BCE. On the other hand, Jeremiah and Ezekiel were 6th century BCE prophetic writers around the time of the Babylonian Exile.