Few know the Beatles as well as Mark Lewisohn

No matter how much you think you know about the Beatles, Mark Lewisohn probably knows more.

Hundreds of books have been written about the band, but none with such care and authority as those by the 58-year-old British author.

His resume includes comprehensive releases on their concert performances (The Beatles Live!) and studio work (The Complete Beatles Recording Sessions), for which he was given a Beatles obsessive's dream job, getting paid by EMI Records to enter the inner sanctum of the Abbey Road studio and listen to the band's recordings.