Leaves of Grass

Leaves of Grass is a poetry collection by the American poet Walt Whitman (1819–1892). Though the first edition was published in 1855, Whitman spent most of his professional life writing and rewriting Leaves of Grass, revising it multiple times until his death. This resulted in vastly different editions over four decades—the first a small book of twelve poems and the last a compilation of over 400 poems.