Last night I started watching Dr. John Covach's free video lecture series on the Beatles through Coursera, which I highly recommend to anybody interested in the band. It is a survey history course - he does not go into much musical detail, and due to copyright restrictions can't even play any of the music - but it is very well researched and engaging to watch. Most Beatles scholars will already know most of the information, but I still learned a few things (I had never even heard of "schlager" before yesterday).
Bottom line: strongly recommended!
Here's a link to join: https://www.coursera.org/course/beatles
This blog is a workshop for developing my analyses of The Beatles' music.