Jim Berkenstadt Mysteries in the Music book.

On the left is the new book "Mysteries in the Music" and on the right is author Jim Berkenstadt sitting next to a guitar.

Jim Berkenstadt was a rock ‘n’ roll detective for many years before he became the Rock and Roll Detective.

The journey began when a young Berkenstadt, who grew up in Chicago, was in an Old Town record store and happened upon a bootleg record of a 1969 Beatles studio session. Years later, Berkenstadt — by then a Beatles expert and author of the acclaimed book “Black Market Beatles” — was in London, in a meeting with Neil Aspinall, chief executive of the Beatles’ Apple Corps company.