He taught at Harvard from 1938 to 1961, where his students included Alice Adams, John Hawkes, Alison Lurie, and Robert Crichton.
He also worked to get funding for the Voice Project, a program that brought professional writers to campus to teach freshmen.
He succeeded Yvor Winters in the literature chair named after Guerard's father, Albert Léon Guérard, who was also a professor at Stanford for many years.
[1][2] His novels include Night Journey, which drew from his experience in psychological warfare intelligence during World War II.
His critical books include The Triumph of the Novel: Dickens, Dostoevsky and Faulkner, which looks at three authors who broke away from realism.