Hopefuly you have an "authority" blog, membership site or website from which you can publish a mini newsletter. there are many benefits of doing so. There's a bit more credibility coming from "authority" sites so that, a mini newsletter can take form as a sales letter with a twist.
The following newsletter / sales letter shows you this in action.
the goal of the single page is to 1) generate revenue from prospects going to the website thus paying for the promotion and 2) generating opt-ins from those signing up for the FREE Ebook thus building a list.
Bear in mind it is untested but you get the idea. This one page mini-newsletter / sales letter should be built out to a full blown 4 page sales letter,
click the link below for the example