Handbook for Sound Engineers is a complete reference for audio engineers. Written by many of the top professionals in the field, including Glen Ballou, Ken Pohlmann, David Miles Huber, Dr. Eugene Patronis, Bill Whitlock, Pat Brown, Ray Rayburn, Dr. Wolfgang Ahnert.
This was a great book. Not nighttime reading, unless you have it for a textbook, but full of more information on audio and the engineering of sound and electricity than I think I can absorb in my lifetime.