The Gospel Coalition is an evangelical renewal movement dedicated to a scripture-based reformation of ministry practices.  This series of audio booklets were edited by D.A. Carson and Timothy Keller.  In this series:
The Kingdom of God, by Stephen Um
Justification, by Philip Graham Ryken
The Gospel and Scripture, by Mike Bullmore
Christ's Redemption, by Sandy Willson
Baptism and the Lord's Supper, Thabiti Anyabwile and Ligon Duncan
Sin and the Fall, by Reddit Andrews III