I just found this and I think it deserves your attention.

Ben Hart, a copywriter, is giving away the digital copy of the book he wrote on “How To Write Blockbuster Sales Letters”… what’s interesting is that he covers a lot more than copywriting in this book.

The physical book sells for $38 but you can get the digital copy free. He doesn’t have a link to this on the main page of his site, and I can’t remember how I got to this page… I’d get this quickly before the page is removed
Click here - requires registration (but it’s worth it)