The Beatles, also referred to colloquially as the White Album, is the ninth studio album and only double album by the English rock band the Beatles, released on 22 November 1968. Featuring a plain white sleeve, the cover contains no graphics or text other than the band's name embossed. This was intended as a direct contrast to the vivid cover artwork of the band's previous LP Sgt. Pepper's Lonely Hearts Club Band (1967). The Beatles is recognised for its fragmentary style and diverse range of genres, including folk, country rock, British blues, ska, music hall, proto-metal and the avant-garde. It has since been viewed by some critics as a postmodern work, as well as one of the greatest albums of all time.