Martha Hoyt McCallum was born in Kenya in 1922 to Quaker missionaries Fred and Alta Hoyt. She earned a BS and MA from Wheaton College by 1946. Martha married WWII navy captain Dr. John McCallum and raised four boys who became Christian ministers and missionaries. Her early ministries included neighborhood Bible studies and Sunday school classes where she taught “God’s Incredible Plan” of salvation in liberal churches. In 1971, during the Jesus Freak movement, Martha launched Layman’s Challenge For Today, which became a church and missions movement known as Xenos Christian Fellowship. She continued disciplining and training leaders in the church until her death at age 91. This web site is devoted to passing on her spiritual legacy by sharing her Bible resources.