Reddit mentions of The Beatles Keyboard Book

> I've looked into other songs as well, and they all have many different versions/interpretations. Why is this?

Because...

1. Pop/rock music is based on chord progressions. Often just 4 chords. Take a listen to this to see how many songs use the same chord progression. So lots of people know the chords that form the foundation of the song, but will play it slightly differently - e.g. for a C major chord, you could play octave C's in the left-hand, or just one C. The right hand could play C,E,G or G, C, E, or embellish and play C,D,E,G, etc. So many variations. Anyone can learn to play something that sounds somewhat similar to the original just by looking at the chords for the song. ... And I bet Paul McCartney would often play it slightly differently each time, too.
   
   
2. Publishers of sheet music don't want to give you exactly what was played on the album, because your average consumer would complain that it doesn't sound like the song they know and love -- because often the piano part is just 4 boring chords over and over (see video in #1), which when played by themselves, may not clearly identify the song. People are stupid and don't realize a lot of their favourite songs' piano parts are like this. So the sheet music will usually contain the melody in the right hand (the vocal 'tune' that is sung everyone knows and loves) along with some chords in the left-hand, arranged to give a sound that people can identify as the song they expect.
   
   
3. continuing point #2, sheet music publishers need to simplify the music so that your average player can play it (and/or to simplify their transcription process) so that they can maximize sales. There usually isn't enough interest in note-for-note perfect transcriptions of the originals, although that does exist and it does seem to be gaining some popularity.
   
   
4. A lot of people have bad ears, and so everyone thinks they've created a perfect tutorial/transcription, but as you've probably found, they're often not that accurate, and so you get tons of variation in "perfect" transcriptions from people. Edit: also, often it's hard to hear exactly what's being played on the piano due to all the other instruments playing, so no two people will agree on exactly what was played.
   
   Anyway, just doing a quick search, this guy's is "OK", though definitely not perfect (sheet here). Or your best bet would probably be something like this:
   http://www.amazon.com/The-Beatles-Keyboard-Book/dp/079351441X/ or this: http://www.manymidi.com/sheetmusic.htm.

http://www.amazon.com/Beatles-Keyboard-Book/dp/079351441X/ref=sr_1_1?s=books&ie=UTF8&qid=1450630573&sr=1-1&keywords=beatles+keyboard

While the Complete Scores book is amazing, this book is a close second as far as keyboard books. It has most of the Beatles actual keyboard parts on the songs that include a piano/organ. The print is a little bigger than the Complete Scores book too, so it's a little easier to read for piano players.