Which Beatles Complete Book do you mean? The Beatles Complete Scores is pretty good, with all the parts written out.
It certainly wasn't Beatles Scores - this was going back to around 1980, large white songbook. Looked great, always wanted to play like George, unfortunatley, turned out to be a very simple piano score with a few random 'chord boxes' thrown in - taught me how to strum the intro to Let it Be, but did nothing for my Get Back lead break !!!