Strongholds of the 10 40 Window: Intercessor"s Guide to the World"s Least Evangelized Nations
George Otis, Jr. is the founder and president of The Sentinel Group, a Christian research and information agency. He has traveled to more than 100 countries and served as Senior Associate for the Restricted-Access World with the Lausanne Committee for World Evangelization.Mark Brockman has worked as an editor and writer in Denmark, Taiwan,and North America. He specializes in world missions, comparative religion and the New Age Movement. He is a graduate of Gordon-Conwell Theological Seminary.