I was listening to The Wizard's Edge and the interviewer asked Jay Abraham for the books which have been the biggest influence on his work. This is what he revealed.
Napoleon Hill - Think And Grow Rich (try the T&GR videos)
Rosser Reeves - Reality In Advertising
Claude Hopkins - Scientific Advertising
Claude Hopkins - My Life In Advertising
David Ogilvy - Ogilvy On Advertising
David Ogilvy - Confessions Of An Advertising Man
What do you think of his choices?
If you read Claude Hopkins, you can see his enormous influence on Jay's approach to marketing and business.
This list is missing some classic direct response marketing books that were included in the book list of Gary Halbert.
I'm surprised that Obvious Adams isn't also included because I have heard Jay urge people to read this in the past.