AC/DC moved to Britain from Sydney in 1975, and soon set up a residency at London's Marquee Club. Their short hair (including the odd mullet), loud rock and attitude chimed well with the lingering pub rock and soon-to-be punk crowd. They weren't really a band for guitar solos, and singer Bon Scott was the original bike-riding, speed-snorting, fighting man. An ex-convict he lived life fast and short; he died in February 1980, just before Back in Black, their huge-selling album, took off, and the second period of AC/DC (with Brian Johnson as lead vocalist) was ushered in. Back in Black has gone on to sell 45 million copies worldwide, and as the band have become a global phenomenon so their recluisveness has increased. Mick Wall, the don of heavy metal writing, seeks to penetrate the wall around the Young brothers, and write the first authoritative, in-depth critcal account of AC/DC.