Cowley then published a revised edition of Exile's Return in 1951. The revisions downplayed some of the more overtly Marxist tenets, and more obviously emphasized the return of the exile as a necessary step toward reestablishing a nation's solidarity: "the old pattern of alienation and reintegration, or departure and return, that is repeated in scores of European myths and continually re-embodied in life", Cowley wrote. This time the book sold much better. Cowley also published a Portable Hawthorne (1948), The Literary Tradition (1954), and edited a new edition of Leaves of Grass (1959), by Walt Whitman. These were followed by Black Cargoes, A History of the Atlantic Slave Trade (1962), Fitzgerald and the Jazz Age (1966), Think Back on Us (1967), Collected Poems (1968), Lesson of the Masters (1971) and A Second Flowering (1973).
As an editorial consultant to Viking Press, he pushed for the publication of Jack Kerouac's On the Road. Cowley's work anthologizing 28 Fitzgerald short stories and editing a reissue of Tender Is the Night, restructured based on Fitzgerald's notes, both in 1951, were key to reviving Fitzgerald's reputation as well, and his introduction to Sherwood Anderson's Winesburg, Ohio, written in the early 1960s, is said to have had a similar effect on Anderson's reputation. Other works of literary and critical importance include Eight More Harvard Poets (1923), A Second Flowering: Works & Days of the Lost Generation (1973), And I Worked at the Writer's Trade (1978), and The Dream of the Golden Mountains: Remembering the 1930s (1980). And I Worked won a 1980 U.S. National Book Award in the one-year category Autobiography.