The book of Jonah is Narrative History and a Prophetic Oracle. The prophet Jonah wrote it approximately 785-760 B.C. before Assyria conquered Israel's Northern Kingdom. Key personalities include Jonah, the captain and the ship's crew and the people of Nineveh.
The purpose of this book is to show that God is a merciful and gracious God. Although the wicked city of Nineveh deserved to be crushed immediately, God was patient towards them. A reluctant prophet, Jonah originally ran from God before delivering a message of repentance to the nation of Nineveh.