This is a part of a reading list I found on Redeemer Pres.' website recently. If you can find the time, I would certainly encourage anyone to pick up a few of these titles.
Putting the Amazing Back into Grace
Evangelism: Doing Justice and Preaching Grace
(This one is excellent!)
"Introduction" to J.Owen's The Death of Death
On the Religious Affections
"Preface" to Commentary on the Epistle to the Galatians
(Just read this yesterday. A pivotal work.)