Today, listened to. John Piper's biography of Martyn Lloyd-Jones (MP3). Lloyd-Jones was a pastor in London and is widely regarded as the greatest preacher of the 20th Century. He was also president of UCCF from 1939.
Piper's 1991 biography looks at theology of the Holy Spirit and God's power to transform us. It's very challenging - does my charismatic theology match my practice?
Once again I see the helpfulness of church history, and learning from those who have gone before me. I've not read much Lloyd-Jones first-hand (only one of his Romans 3v1-3v20 sermons and Habakkuk)
A Passion for Christ-exalting power - text version.