An essay by James Watts examines the question. You can acquire it here. And here’s the source and the abstract:
From The Whirlwind: Essays on Job, Hermeneutics, and Theology in Memory of Jane Morse (ed. S.L. Cook, C.L. Patton, and James W. Watts; JSOT Supplement Series 336; London: Sheffield Academic Press, 2001), 168-80.
The author of the book of Job employed an unreliable third-person narrator of the prologue and epilogue whose claims to knowledge of heavenly motives are challenged by an omniscient character, God, in four chapters of divine speeches. Readers, however, have been swayed by literary convention to believe the prose narrator rather than the divine challenger of such narrative pretensions as omniscience.