The Book of Jonah is an Old Testament book that tells the story of the prophet Jonah and his journey to Nineveh. It is a story of obedience, repentance, and mercy. Through Jonah's journey, readers learn about the power of God's grace and how it can bring about redemption
From Wikipedia
The Book of Jonah is one of the twelve minor prophets of the Nevi'im ('Prophets') in the Hebrew Bible, and an individual book in the Old Testament where it has four chapters. The book tells of a Hebrew prophet named Jonah, son of Amittai, who is sent by God to prophesy the destruction of Nineveh, but attempts to escape his divine mission.