what is the title of the copywriting book by the masters of
copywriting from the 1930's including superstars of
copy such as:
--> Claude C. Hopkins 
--> H. Harry Thompson 
--> Joseph Appel 
--> Bruce Barton (His famous Berea College
letter brought in a whopping 100% response!) 
--> J.K. Fraser
--> Ben Nash 
--> Kenneth Goode

I am confident that the book you seek is "Masters of Copywriting."

Here is Amazon's description of the book:

"A complete course in writing advertising and direct mail copy that
sells. Contributors include experts from the early part of the 20th
century with parts of the course written by the greatest copywriter of
all time, Claude C. Hopkins. Other contributors include: H. Harry
Thompson, Joseph Appel, Bruce Barton, J.K. Fraser, Ben Nash, Kenneth
Goode, John Star Hewitt, George L. Dyer (this is the only known
writing by Mr. Dyer known to exist on the subject of copywriting),
John Lee Mahin, O. A. Owen, and many others. 25 lessons, 391 pages.

Product Details:

Ring-bound: 391 pages 
Publisher: DVallieres/InfoProductLab (January, 2004) 
ISBN: 1931045003"

Amazon.com: Masters of Copywriting
http://www.amazon.com/exec/obidos/tg/detail/-/1931045003/

Google search strategy:

Google Web Search: masters copywriting "391 pages"
://www.google.com/search?hl=en&q=masters+copywriting+%22391+pages%22

If I have misidentified your book, please request clarification; I'll
be glad to offer further assistance before you rate my answer.

Best regards,
pinkfreud