Best books for Beatles musicology | Fab Forum

Don't see a similar thread active within at least a year, sorry to annoy.

I have:

Alan Pollack's writings via WWW,

Recording Sessions, Lewissohn,

Complete Scores, ed. all,

Beatles as Musicians, Everett.

I recently received the last book and it's really awesome.  I want to make sure any worthwhile related material or essential tomes for this topic aren't being looked over.

Not interested in anything purely biographical or criticism, more about technical aspects re: composition and equipment (in that order).