I have a B.A. in physics, but I would like to get a better handle on the practical knowledge of electronics. I'm working in a lab now and am continuously frustrated by my lack of experience in actually using different instruments, cables, etc. I have had an introduction to basic electronics, but I want a good book to really get acquainted with it. I've got the learning by doing thing covered for now - I need a reference that includes theory and the details beyond theory, and is friendly to newcomers. Recommendations? I apologize if this is the wrong place to post this question.