Francis Chan. I was fortunate to hear this man speak at Holy Trinity Brompton Church a few weeks ago, and just recently I have come his books Crazy Love and Forgotten God. I listened to the first one on audiobook and was challenged to say the least! His message is desperately needed by the church!! If you feel you have any lack of commitment or lukewarmness in your life then get hold of Crazy Love. You will be changed I can guarantee.