The prophetic book after Micah is Nahum, which is five letters long. Nahum is a book of the Hebrew Bible and part of the Minor Prophets. It is believed to have been written by the prophet Nahum, who lived in the 7th century BC. The book contains a message of judgment against Nineveh, the capital of the Assyrian Empire. It also contains a message of hope for the people of Judah, who were suffering under the rule of the Assyrians.