Geoff Emerick became an assistant engineer at the legendary Abbey Road Studios in 1962 at age fifteen, and was present as a new band called the Beatles recorded their first songs. He later worked with the Beatles as they recorded their singles She Loves You and I Want to Hold Your Hand, the songs that would propel them to international superstardom. In 1964 he would witness the transformation of this young and playful group from Liverpool into professional, polished musicians as they put to tape classic songs such as Eight Days A Week and I Feel Fine.

Then, in 1966, at age nineteen, Geoff...