Walt Whitman created, in various editions of Leaves of Grass, what is arguably the most influential book of poems anywhere in the past 200 years. Whitman absorbed the world, transmuting it into poems that address a spectrum of topics--from democracy and religion to sexuality, gender, class, and identity. He exuberantly incarnated his epoch at the same time as he invoked "you"-- readers and "poets to come"--to join in a "poetry of the future." The first A to Z Whitman reference to incorporate 21st century scholarship, this work is ideal for readers who want a concise introduction to the major poems and prose and to the people, places, and topics central to his life. Each of the book's 142 entries is followed by cross-references to related entries and suggestions for further reading. Also included are a brief biography, a chronology of Whitman's life and major works, and a bibliography of some 300 primary and secondary sources on this most timeless and contemporary of poets.