For out of print marketing books, try http://www.twipress.com
For your swipe files, study these masters:
Words That Sell is a must-have reference. I also use Phrases That Sell
a lot. We recommend these books to our clients all the time. They sit
right next to my desk for easy reference when I’m writing.
Lorrie also mentioned John Caples’ book Tested Advertising Methods.
This book was also highly recommend to me by Ken McCarthy of The System
fame. He said you should only get the 4th Edition. Apparently the most
recent edition has been edited by a text book company and no longer has
the best stuff in it. You’ll probably have to do some detective work to
find a 4th edition.