The DG Blog provides a four-part series on the problem of evil:
Part 1 — Does God Author Sin?
Part 2 — Does God Cause Sin?
Part 3 — Does God Permit Sin?
Part 4 — The Author-Story Model
In addition to recent sermons from John Piper on the subject, selections from John Frame’s The Doctrine of God (Chapter 9, “The Problem of Evil”) are reprinted.