Black Sabbath FAQ - All That's Left to Know on the First Name in Metal Biography In a fast-moving, topical format, this book covers a tremendous amount of information, delectable to any Sabbath fan, but hard to find in a traditional biography. This rich history lives and breathes and shouts right here. Black Sabbath FAQ digs deep into quirks, obscure anecdotes, and burning questions surrounding the Sabs. Martin Popoff is a heavy metal expert who has authored over 30 books on the subject. ©2011, 400 pages.