You say you previously owned the Gunsmith of Grenville County. Did you have a problem with that book?
Regarding your two choices, The Art of Building the PA Longrifle is more basis and easier to follow for a beginner. It is the first of the three that I purchased and it helped me tremendously during my second build. I don't talk about the first.
Peter Alexander, who wrote the G of GC, is also a co-author of Recreating the American Longrifle and the books are similar, although I agree that Recreating is better.
I also agree that all three books are worth having.
Not sure if that helped or not....
Dale H