When you’re a heretic you set about teaching others to be heretics also. That’s the story behind the two books written by Hal Banks. His first, Introduction to Psychic Studies (now out of print), was not at all what the rank and file would expect a Presbyterian (USA) Minister to write. But his classes that used his book as a text were well-attended by church people and non-church people as well. It has also been used as a text at colleges in Canada, South Carolina and California.