I heard an interview on Fresh Air regarding an interview with Bob Spitz, author of "The Beatles: The Biography".

Some fresh new information about the band. For example, John Lennon and George Harrison hated being around Paul McCartney because he was too controlling in the studio.  The author says that it was because of this situation that the band really broke up.  Supposedly, John was so tired of Paul and the clean image Paul promoted for the whole band that John used Yoko as a hand grenade to blow the band up.  I have attached the interview to this post.  It is about 13 mb in size.  If using a modem it may take about 10 minutes, but worth the wait. Anyway, follow the link if you want to look at the book: http://www.amazon.com/gp/product/0316803529/qid=1133482937/sr=2-1/ref=pd_bbs_b_2_1/103-6175271-6976619?s=books&v=glance&n=283155