Re: Guitar Electronics Book??
All of the previous, plus look up any books by Adriann Legg, he's got a couple that are good also if you are just interested in the electronics inside the guitar itself; If you want to delve into effects and what not then Erlwine's and some of Craig Anderton's books should help you out, they are advertised in just about ever issue of evry other guitar magazine out there, and in the resource pages of many guitar parts websites.