In July 1980, five months after the ultimately death of frontman Bon Scott, AC/DC released Back In Black, an album which has gone on to sell over 40 million copies worldwide, & one of that many fans consider the greatest of the groups career. Chock-full of the heaviest riffs, the most bombastic production & the best double entendres rock music has ever encountered, the record catapulted AC/DC into the big league, big time.