The book featured an introductory interview by Paul McCartney. It included details such as who played on each track and how many takes were recorded in each session. The book was in the form of a diary, listing chronologically every recording session the Beatles had at Abbey Road Studios. After being invited by EMI to listen to all of the Beatles' original session tapes, Lewisohn wrote The Complete Beatles Recording Sessions (1988). His 1986 book The Beatles Live! featured a complete history of all the Beatles' live performances, in a format which Lewisohn would follow for his subsequent books. Writing books and consulting on TV series, and ended up working for them.

When he began researching the band, he 'found that it was a deep and rewarding history that was, for the most part, not very well researched by anybody else, so I just found a career by becoming a Beatles expert, I suppose you would say. The fanzine commissioned him to answer fan letters after he won a quiz at the first London Beatles convention.

Lewisohn has been writing about the Beatles since 1977, when he became a contributor to the fanzine Beatles Monthly. The Beatles and related subjects Early books His works include The Complete Beatles Recording Sessions (1988), a history of the group's session dates, and The Beatles: All These Years (2013–present), a three-volume series intended as the group's most comprehensive biography. He has been referred to as the world's leading authority on the band due to his meticulous research and integrity. Since the 1980s, he has written many reference books about the Beatles and has worked for EMI, MPL Communications and Apple Corps. Mark Lewisohn (born 16 June 1958) is an English historian and biographer.

The Complete Beatles Recording Sessions.

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