Huston Smith, a renowned scholar of religion who pursued his own enlightenment in Methodist churches, Zen monasteries and even Timothy Leary’s living room, died on Friday at his home in Berkeley, Calif. He was 97. His wife, Kendra, confirmed his death. Professor Smith was best known for “The Religions of Man” (1958), which has been a standard textbook in college-level comparative religion classes for half a century. In 1991, it was abridged and given the gender-neutral title “The World’s Religions.” The two versions together have sold more than three million copies.