S.F. Sorrow is the fourth LP by the British rock group The Pretty Things, released in 1968. One of the first rock concept albums, S.F. Sorrow was based on a short story by singer Phil May. The album is structured as a song cycle, telling the story of the main character, Sebastian F. Sorrow, from birth through love, war, tragedy, madness, and the disillusionment of old age. S.F. Sorrow was released in mono and stereo; both have been rereleased on CD by Snapper Records. The band's members have expressed a strong preference for the mono mix.