Inside this manual you will find routine maintenance, tune-up procedures, engine repair, cooling and heating, air conditioning, fuel and exhaust, emissions control, ignition, brakes, suspension and steering, electrical systems, and wiring diagrams. 
Inside this manual you will find routine maintenance, tune-up procedures, engine repair, cooling and heating, air conditioning, fuel and exhaust, emissions control, ignition, brakes, suspension and steering, electrical systems, and wiring diagrams.
and a Chiltons or shop manual…
To me, there is no reason to not have these type of books available if you do any of your own repairs. I cannot say that EVERY bit of information you will ever need is inside these but there is a good amount to get you started. The internet can provide with a lot of info but isn’t always available where you are when you need to look into an issue.