Hi, I read a book from the 1970s or early 80s about a religious cult, but I can't remember its name. One of the main characters recruited to the cult was a professional athlete (runner?), and I remember he needed meat, but the cult didn't eat meat, so he felt he couldn't perform as well as he could. This book was later made into a movie, and I remember seeing it, but it was a long time ago. Anyway, I love to know its title so I can find it again.
by Mars-Bar-Attack