I have most of their albums in both LP and CD form, a few documentaries including the interesting Ron Howard- produced "8 days a week - the touring years." I have made compilations for people as gifts. I hung onto every word o their '94 documentary. I first got interested in them when back in the early 80s I found a paperback book called "the love you make" which was an excellent retelling of the Beatles' story from their early days until their breakup. I really dig the backstory of some of their songs such as "fool on the hill" which, it turns out has a musical "etymology" that is quite complex, but is rooted in a weird paranormal incident when Paul was walking his dog [named Martha] atop primrose hill overlooking London, and as he watched the sunrise, he noticed Martha went missing. Paul looked around for her when he encountered a strange man wearing a belted raincoat- the two exchanged pleasantries about the sublime view of the city atop the hill, then Paul turned away from the man for an instant, and when he looked back the man was gone, which was strange because the nearest trees were hundreds of feet away and the man could not have run that far that fast. then again, since Paul was at that time a heavy user of mind-altering weed, it could just have been that his perceptions were up in smoke.
so that is one part of the fool on the hill, the original impetus for Lennon/McCartney to write it down on paper. the other part of the fool has to do with George and his veneration of the maharishi, "head in a cloud, the man of a thousand voices talking perfectly loud" [IOW the Hindu religion has been referred as being made up "of thousands of gods/voices"]- and when George tried to get Paul and john to share his interest, he was met with indifference ["but nobody ever hears him, or the sound he appears to make, and he never seems to notice..."], IOW john and Paul weren't listening. so i am gathering that the maharishi was indeed the other major part of the subject of "the fool on the hill."