WWittman, as usual, was right!
The book is
http://www.recordingthebeatles.comand it will have no information (directly) about Jimmy Page, but may answer your gear questions about The Beatles. 300 or so pages, many nice photos of studios and gear (even unseen Beatles pics), and a FULL chapter on just the outboard gear, most of which you have never seen in a photo.
There's a LOT of misinformation about EMI and the Beatles - a good example here is people talking about desks that were (by and large) a 1970's item. (FWIW - I have only seen TWO people in the world that actually have cassettes from the Beatle-used desk, although many claim to be. It's easy to spot, but I'm not allowed to say how...)
Please be careful about little tidbits of information you hear at this point... lots of mistakes there.