Know-How Exchange : E-Marketing

My target market is self published authors of non fiction books that want to make more money from their work. What ideas do you have for finding these partcular individuals and get them to visit a site. (dealing with conversion rates of site visitors separately, just need help with ideas for traffic generation for this specific group.)

P.S. Looking for lots of alternatives. Paid sources ok. Free sources requiring extra work, even better.

Thank you in advance to the marketing gurus here,

Ryan