I was wondering about the Robert Collier Letter Book. I know it is one of the most respected works on direct mailing and copywriting. I know one very well-respected Internet marketer has put it on his recommended book list for 2009, but he also suggests getting the 4th edition or earlier. It is not an easy book to find; I did find the 6th edition online, but I'm not sure whether it is worth getting or not.
Why would one suggest that your best value is via the 4th edition or earlier? Is there that much of an advantage with getting the 4th edition or earlier or is a more current edition just as useful?
Additionally, I've seen digital versions of the Robert Collier Letter Book on eBay - would that be worthwhile to purchase? It is supposedly from "the original 1937 Letter Book," a "reformatted replica of the original 1937 edition."
Also, I've also seen reports of a "Robert Collier Marketing Course" (also known as "How To Make Money At Home In Spare Time By Mail In Seven Lessons"); is this a book/course worth getting or not?
I'd appreciate any and all advice on these topics - thank you.
Please take care and have a great day!
Joe Chengery III