The Whisperer in Darkness
"Documents in the Case of Elizabeth Akeley", a 1982 sequel to "The Whisperer in Darkness" by Richard A. Lupoff, describes Akeley, inspired by the evangelist Aimee McPherson, starting a sect called the Spiritual Light Brotherhood and serving as its leader, the Radiant Father. After his death, his granddaughter Elizabeth Akeley took over the role.