Among Frost's volumes of poetry are New Hampshire (1923), West-running Brook (1928), Collected Poems (1930), A Further Range (1936), A Witness Tree (1942), Steeple Bush (1947), and In the Clearing (1962). A Masque of Reason (1945) and A Masque of Mercy (1947) were blank verse plays. Although his work is rooted in the New England landscape, Frost was no mere regional poet. The careful local observations and homely details of his poems often have deep symbolic, even metaphysical, significance. His poems are concerned with human tragedies and fears, his reaction to the complexities of life, and his ultimate acceptance of his burdens. Frost was awarded the Pulitzer Prize for poetry in 1924, 1931, 1937, and 1943. Frost's critical reputation has recently rebounded after a period when his poetry was often criticized for being old-fashioned.
See his complete poems (1967); his Collected Poems, Prose and Plays (1995), ed. by R. Poirier and M. Richardson; his letters (1972), ed. by A. Grade; biographies by M. L. Mertens (1965), L. R. Thompson (2 vol., 1966-70, vol. III, with R. H. Winnick, 1976), W. H. Pritchard (1985), S. Burnshaw (1986), J. Meyers (1996), and J. Parini (1999); studies by R. A. Brower (1963), F. Lentricchia (1975), and R. Poirier (1977).