I've had a copy of "Ultimate Auto Detailing" by David Jacobs for many years and found it to be an excellent if dated book. It's very good for the novice who is struggling with processes and procedures.
As for products, there are many used in those books which are used today. Obviously the industry has expanded greatly and technology has changed, but the way you detail a car hasn't changed alot in the 25+ years I've been doing it. Cars and cars. Paint is paint. Its just car detailing, not rocket science.
I think you'll enjoy the books.