I think I understand what you are asking, and perhaps I might be able to help...

There are a couple of threads here that do a great job of walking you through the body work on these cars. While not a book, and not necessarily a step-by-step guide, they are really excellent sources of information for those of us doing our own body work. While I hate the answer; "do a search," I think that would provide a good start for you on this subject. However, since I loathe the do a search answer, I will provide a few links that I have saved for when I begin the body work phase on my car:

https://www.ffcars.com/forums/17-fac...rk-thread.html

http://www.ffcars.com/forums/17-fact...rk-6583-a.html

https://thefactoryfiveforum.com/show...is%27+bodywork

https://www.ffcars.com/forums/17-fac...int-works.html

I know that other folks have links that they like, or have helped them with their body work, and I am sure they will post them as well.
Then, what Jeff Miller was saying is that he and a few others who are subject matter experts on paint and body work, can walk you through pretty much anything you may experience. These guys are true craftsman, and are shockingly willing to help anyone who asks. I am constantly amazed at their selflessness, and the help they provide here! Basically, post any question you may have concerning body work and paint, and they will address your questions. The lengths that he and others go to help guys like us is perhaps the greatest gift of this forum!

So, if you want to learn how to do body work and paint your car, you have come to the right place. It's not a book, but the threads can really help get you a jump start, and then any challenges you encounter can be addressed by Jeff Miller (Da Bat), Jeff Kleiner (Captain O-ring), and a few others. I hope this helps answer your question, or perhaps offers a level of comfort that you can do this.

Best of luck with whatever you decide, and I hope I have helped in some small way.

Regards,

Steve