ArcSabbath continues into the 1990s as Tony Martin and others step aside for a reunion with Ronnie James Dio, and the rest of the Mob Rules era line-up. This period would produce the album Dehumanizer before imploding yet again, when Tony Iommi and Geezer Butler's true intentions became clear - that elusive reunion with original singer Ozzy Osbourne! Mick Wall, Martin Popoff, and Joel McIver's books help to fill in the blanks and lend context to this era where you could say Black Sabbath were going through changes!