Jonah is unusual as a prophetic book in that it is a narrative account of Jonah’s mission to the city of Nineveh, his resistance, his imprisonment in a great fish, his visit to the city, and the subsequent outcome.
Jonah was a native of Galilee, 2 Kings 14:25. His miraculous deliverance from out of the fish, rendered him a type of our blessed Lord, who mentions it, so as to show the certain truth of the narrative. All that was done was easy to the almighty power of the Author and Sustainer of life. This book shows us, by the example of the Ninevites, how great are the Divine forbearance and long-suffering towards sinners. It shows a most striking contrast between the goodness and mercy of God, and the rebellion, impatience, and peevishness of his servant; and it will be best understood by those who are most acquainted with their own hearts.Matthew Henry