I am looking for a good read on music theory, preferably guitar specific.

I would like it to be more academic in nature, or at least something that is not geared toward reading with an instrument in hand.

I have lots of those big skinny "Methods" books that you can get at a music store, and lots of online resources I can use with my guitar.

I am looking for more of a reference book or "bible" that I can read with a morning coffee, in bed at the end of the day when everything else is powered down, or bring to the beach. Something I can flip around in and highlight. That I can come back to repeatedly as my skills improve.

Like I said, there may not be such a book. 

Thanks for any help.