Procol's Ninth is the eighth studio album by Procol Harum, and was released in August 1975. Produced by songwriters Jerry Leiber and Mike Stoller, Procol's Ninth featured a slightly different direction from the previous album, with a much starker sound than Chris Thomas's more elaborate productions. According to an interview with guitarist Mick Grabham, conducted by Roland Clare for the 2009 reissue, Leiber and Stoller focused less on the production sound and more on "the structure of the songs". The band appeared on the cover of the album in a straightforward unassuming photograph, mirroring the sound of the album itself. The cover featured simulations of each band member's signature.