Margaret Mead, which made for some decent reading).
Made into a movie I've never seen
Every single New York City setting is presented like an '80s TV movie, with about as much invention: Central Park, Columbia University, the psychiatrist's office, the occult paraphernalia store, the morgue, the police station, the cult ceremony. Even the downbeat ending was telegraphed. Early on I liked the academic anthropology angle, but making "the religion" an actual one - Santeria, a voodoo variant - showed little imagination and weird sort of tasteless cultural appropriation. I think if Condé had created a bizarre cult of his own, I'd have been much more into The Religion, but I guess I'm just a horror fiction atheist after all.