When asked, here are the first five books that come to mind for J. I. Packer:
- John Calvin, Institutes of the Christian Religion (2 vols.)
- J. C. Ryle, Holiness
- John Bunyan, The Pilgrim’s Progress
- Richard Baxter, The Reformed Pastor (+ others)
- John Owen, Indwelling Sin and The Mortification of Sin (+ his books on Justification, The Holy Spirit, and The Death of Death in the Death of Christ).