Well, I dont have a book to recommend to you, but I can offer some input. First, it depends entirely whether you are talking about a modern car or an old one. Truely "old" cars are purely electrical. As you transition to a modern car, you move from electrical to electronic.
Electrical vs. Electronic are 2 very different things. The first is primarily Volts, Amps, Resistance, etc. The second is more about binary/digital logic and good vs. bad chips. Electrical can usually be repaired. Electronic is usually replaced. Many more distinctions can be made between them.
If you want to understand automotive electronics, you really need a good foundation in general electronics or at least in digital logic. If you want to understand automotive electrical concepts, you will have a much easier time because after you know some basics, you just follow a wiring diagram to find your problems.
One last note, there is another area of electronics, but it doesnt come into play much in cars. Analog electronics would apply to things such as radio restoration and repair. Mostly, any electronic component that is not a "chip" (resistors, capacitors, transformers, etc.) is covered under analog electronics.