In The Cross and The Crescent, Dr. Dirks, a former ordained minister (deacon) in the United Methodist Church, a graduate of Harvard Divinity School and with a doctorate in clinical psychology, reaches out to the Christians and the Muslims for an interfaith dialogue. Drawing on his seminary education and thirty years of interaction with Muslims in America and overseas, the author digs deep into the roots of Christianity to bring out obscure information that highlights what was once common between Christianity and Islam