Here's a video overview from Mars Hill:
For more on Newton, see:
- John Newton: From Disgrace to Amazing Grace, by Jonathan Aitken
- John Newton and the English Evangelical Tradition: Between the Conversions of Wesley and Wilberforce, by D. Bruce Hindmarsh
- The Roots of Endurance: Invincible Perseverance in the Lives of John Newton, Charles Simeon, and William Wilberforce, by John Piper [you can also read or listen to Piper's biographical address on Newton, upon which the chapter is based]