When metal masters Ronnie James Dio, Tony Iommi, Geezer Butler, and Vinny Appice reunited for the first time in 15 years to record new bonus tracks for Rhino's 2007 compilation Black Sabbath: The Dio Years, an otherworldly force reignited their musical connection. "Everyone had so much fun playing together that we didn't want it to end," the band recalls. It didn't--they reformed as Heaven & Hell--named for the classic 1980 LP that was the lineup's debut as Sabbath--and staged a triumphant, sold-out world tour throughout 2007-2008. Fueled by their chemistry on the road, the quartet returned to the studio in 2008 to record THE DEVIL YOU KNOW, their first new set of original material since 1992's Dehumanizer. "We wound up writing and recording an album that stands up to anything we've ever done," says the legendary band. "We're really proud of the music and excited for people to hear it."