Music like The Sign of the Southern Cross

Mob Rules is the tenth studio album by English heavy metal band Black Sabbath, released in November 1981. It followed 1980's Heaven and Hell, and was the second album to feature lead singer Ronnie James Dio and the first with drummer Vinny Appice. Neither musician would appear on a Black Sabbath studio album again until the 1992 album Dehumanizer.

Produced and engineered by Martin Birch, the album received an expanded edition release in 2010.

The first new recording Black Sabbath made after the Heaven and Hell album was a version of the title track "The Mob Rules" for the soundtrack of the film Heavy Metal. The track "E5150" is also heard in the film but not included on the soundtrack. According to guitarist Tony Iommi's autobiography Iron Man: My Journey Through Heaven & Hell with Black Sabbath, the band began writing and rehearsing songs for Mob Rules at a rented house in Toluca Lake in Los Angeles. Initially the band hoped to record in their own studio to save money and actually purchased a sound desk; but, according to Iommi, "We just couldn't get a guitar sound. We tried it in the studio. We tried it in the hallway. We tried it everywhere but it just wasn't working. We'd bought a studio and it wasn't working!" The band eventually recorded the album at the Record Plant in Los Angeles.