Internet Links
Leper's Schematics, a lot of schematics for downloadable audio circuits.
Books and Articles
Basic Electricity
Miller, R.
Basic Electricity: Theory and Practice
Kaufman, M. & Wilson, J.A.
Electricity: Principles and Applications
Fowler, R. J.
Fundamentals of Service: Electrical Systems
John Deere Service Publication
Electricity and Basic Electronics
Matt, S.R.
Elements of Electricity
Timbie, W.H.
The Incredible Illustrated Electricity Book
Riso, D.R.
Introduction to Electronic Technology
Romanek, R.J.