Sylvia Plath was an American poet, novelist, and short story writer. She is credited with advancing the genre of confessional poetry and is best known for two of her published collections, The Colossus and Other Poems (1960) and Ariel (1965), as well as The Bell Jar, a semi-autobiographical novel published shortly before her death in 1963. The Collected Poems were published in 1981, which included previously unpublished works.