About the book (from Wikipedia):
Leaves of Grass is a poetry collection by the American poet Walt Whitman (1819–1892), first published in 1855. The poems of Leaves of Grass are loosely connected and each represents Whitman’s celebration of his philosophy of life and humanity. This book is notable for its discussion of delight in sensual pleasures during a time when such candid displays were considered immoral.
About the author (from Wikipedia):
Walter “Walt” Whitman was an American poet, essayist and journalist. A humanist, he was a part of the transition between transcendentalism and realism, incorporating both views in his works. Whitman is among the most influential poets in the American canon, often called the father of free verse. His work was very controversial in its time, particularly his poetry collection Leaves of Grass, which was described as obscene for its overt sexuality.