I'd like to get started tinkering with amps, but the only thing I know about it is that I don't know anything. I don't want to be dumb and just start messing around with things I don't understand that can kill me, so I'd like a good book to read that explains the basics. Something that is easy to approach on the scholastic side and also filled with practical information that can be put to direct use. Any recommendations? Thanks in advance!