The Beatles Unseen Archives by Tim Hill, Marie Clayton, Daily Mail published by Parragon Inc. in 2002. The Complete Beatles Chronicle: The Only Definitive Guide to the Beatles' entire career on stage, in the studio, on radio, TV, film and video by Mark Lewisohn, George Martin published by Hamlyn in 2006. Mark Lewisohn is the acknowledged world authority on the Beatles. Before embarking on The Beatles: All These Years his books included the bestselling and influential The Complete Beatles Recording Sessions and The Complete Beatles Chronicle. He was a consultant and researcher on all aspects like TV, DVDs, CDs and books of the Beatles own Anthology and has been involved in numerous additional projects for them.