FWIW, I know Marc Galanter personally. I shall have to read that.
Galenter, M. (1999). Cults: Faith, healing, and coercion (2nd ed.). New York: Oxford University Press.
Besides the unforgetable duo of Mosky and Metter, we should also remember Soapy Bubbles (Doug Furth) of Ohio.
And Mingy - I forget his real name. I think he was from Chicago.