God's Trademarks: How to Determine Whether a Message, Ministry, or Strategy is Truly from God
George K. Otis Jr. is founder and president of The Sentinel Group, a Seattle-based Christian research and information agency assisting in evangelism and community transformation worldwide. Formerly he served as senior associate with the Lausanne Committee for World Evangelization, and, until recently, as the co-coordinator of the United Prayer Track of the  A.D. 2000 and Beyond Movement. He is a frequent speaker at churches, schools, and conferences, and is the author of The Last of the Giants and The Twilight Labyrinth. Otis lives in Lynnwood, Washington.