I've been thinking at some point I'll want to make a DIY amp kit - seems to be the best way to get a blackface princeton or tweed deluxe for under a grand. Unfortunately, I'm pretty ignorant about amp details and electronics. Biasing for instance isn't something I really understand, but I know the difference between AC and DC, and resistor vs. capacitor, I think. What would be a couple of good books to get me started, that don't assume a lot of technical background?