Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Walt Whitman's Complete Works

Among the many American authors and poets, the name Walt Whitman stands out as a giant. He single-handedly transformed the world of American poetry with his one and only collection, Leaves of Grass. Leaves of Grass, however, is not one collection between two covers. Rather, it is a collection of collections. Poems like "When Lilacs in the Dooryard Bloom'd", "O Captain, My Captain", and "I Hear America Singing" have forever been imprinted in the American psyche as brilliant, original works of literature. This book not only features Leaves of Grass, but also discarded poems and unpublished poems that were not published in the book. This book is a definitive introduction to the works of one America's greatest literary giants.