For more background details on 1 Peter and 2 Peter/Jude, Duckett recommends consulting D. A. Carson and Douglas Moo’s An Introduction to the New Testament. Listeners will also find the chapters in A Biblical-Theological Introduction to the New Testament: The Gospel Realized helpful.
Ben recommends Everyday Church by Tim Chester as a practical look at 1 Peter specifically. For a single volume commentary covering all three books, listeners can check out Thomas Schreiner’s book in the New American Commentary series
