My favourite book title is
"How to Build and Use Electronic Devices Without Frustration, Panic, Mountains of Money, or an Engineer Degree"
Stuart A. Hoenig
Pretty good book as well although I guess getting dated now. I haven't looked at it in years.
I do remember a bit discussing three prong mains plugs, how current returning through the operator is know in the trade as getting zapped, and how non-habit forming it is.