Among silent film comedians, three names stand out-Charlie Chaplin, Buster Keaton, and Harold Lloyd-but Harry Langdon indisputably deserves to sit among them as the fourth "king." In films such as The Strong Man (1926) and Long Pants (1927), Langdon parlayed his pantomime talents, expressive eyes, and childlike innocence into silent-era stardom. This in-depth biography, which features behind-the-scenes accounts and personal...