Re: "How to Play Your Best Golf All the Time" by Tommy Armour
I read this book as a kid--teenager, I think--which is longer ago than I care to admit.
The swing advice has been pre-empted as theories and especially equipment have changed over the decades.
Other things are perfectly relevant today, being based on human nature. A good deal of what he says regarding course management is really ego management; or as Dirty Harry famously noted, "A man has got to know his limitations."
Tin Cup wouldn't have given away the US Open had he read (and understood) Armour's book.