intelleckshulls as soon as it came out in 1964. The JFK SWC Center Bookstore at Ft Bragg couldn't keep it in stock. With no Amazon, B&N, Borders and such, people were driving to D.C and Atlanta to buy it. Seriously. Now, those of us with a first edition are all old...

Unfortunately, those who read it in those early days didn't rise to high command in Viet Nam for seven years or more...

That being said, it was not and is not the be all and end all on the topic, just one of many decent treatises on the subject.