Our Bibles do not tell us who wrote the book of Jonah. Tradition has it the account was written
by Jonah himself.
Alternatively, similarities in the narratives lead some Bible scholars to conclude the story of Jonah was written sometime in the 8th century BC by men from the same group of Hebrew scribes credited with assembling 1 and 2 Kings from a variety of other documents; documents like the
“Chronicles of Samuel the Seer”, the
“Chronicles of Nathan the Prophet”, the
“Chronicles of Gad the Seer”, the
“Prophecy of Ahijah the Shilonite”, the
“Visions of Iddo the Seer”, the
“Chronicles of Shemaiah the Prophet”, the
“Chronicles of Jehu the Son of Hanani”, the
“Story of the Book of the Kings”, and so on. These earlier documentary sources, which may or may not have been inspired by God in their entirety, later served to provide the Spirit-led editors of Kings and Chronicles with the historical details from which they drew the spiritual lessons with which we are familiar.