His doctrines were taught in secret in Catskill, N.Y. Non-Compromised Pendulum, a book primarily written by Dr. Oleg Maltsev, documents the ideologies and scientific virtues of D’Amato.

Scott Simon talks with singer-songwriter Anthony D'Amato about exploring uncertainty and transformation in his new folk album, "At First There Was Nothing" and an accompanying photography book.

We're here to talk about Iron Ambition, Tyson's new book about his former trainer. Tyson writes that when he and D'Amato first met, D'Amato was considered washed up and Tyson hadn't even begun.