You might like to watch the film "Produced by George Martin" which provides a little deeper insight into how George approached recording and producing the Beatles but perhaps more importantly how he used Abbey Road before he started with the Beatles. It highlights many lesser known artists which came through that studio and how George learned through recording comedy records and other types of records which informed his approach to the Beatles.

http://www.uncut.co.uk/produced-by-george-martin-review

I picked it up from our local library - hopefully you can find a copy to watch nearby. Very fascinating to a music/recording geek.