www.clickbank.com - the best online swipe file of direct response sales letter http://www.ultimate-online-swipe-file.com/ - at present it is $997 http://www.hardtofindads.com/ - just sign up, its free i suggest you all buy "tested advertising methods" - just to understand how humans behave when it comes to buying and reacting to emotions. you NOT need any other book
Alternatively, Brian Clark's Copyblogger.com has a huge amount of invaluable info on writing better, and a big community of people to help you
Swipe all you want, but if you don't know the "why" behind it all, you'll never be great. You can just hope to be "good" someday. You also need to understand that some stuff is time sensitive. Going in the past and pulling it out won't help today. And a lot of stuff worked because of multiple factors. So, just pulling out a headline or paragraph idea won't help much if you don't know what's realy going on.