Born just outside London in 1942, Glyn Johns was sixteen years old at the dawn of rock and roll. His big break as a producer came on the Steve Miller Band's debut album, Children of the Future, and he went on to engineer or produce iconic albums for the best in the business: Abbey Road with the Beatles, Led Zeppelin's and the Eagles' debuts, Who's Next by the Who, and many others. Even more impressive, Johns was perhaps the only person on a given day in the studio who was entirely sober, and so