The Ultimate Guitar Handbook (it may just be The Guitar Handbook) by Ralph Denyer is really good.
The Guitar Grimoir gives a very understandable breakdown of basic theory.
Scarred for life!

Gibson LPC
Jackson DK10D
Fender HM Strat
Custom built Tele-type
Alvarez 5040 Koa
Epiphone 12 string
Blue Voodoo 50
Dunlop 213 slide
Fender M-80 chorus
Digitech Jimi Hendrix Experience