Indomitable Mr. O Paperback Book"The Indomitable Mr. O" The amazing story of the struggles, testings, and ultimate triumph of J. Irvin Overholtzer, founder of the world's largest evangelistic outreach to children, a ministry called; Child Evangelism Fellowship. At age 60 Jesse Irvin Overholtzer staked all on the revolutionary premise that children could be won for Jesus Christ something not widely accepted in his day. His diligent study of God's Word convinced him and at great