Unless you’re a celebrity, famous author or just an exceptional writer who caught some lucky breaks, you will have to make at least some effort marketing your own books.
Books do not market themselves, nor do agents and publishers do all the work for you if you’ve gone that route. And if you’re a self-published author, that means most or all of the burden of marketing falls upon your shoulders.
This article talks about methods you can use to promote your book. One thing I want to point out is that it’s difficult to determine which methods pay off even after you’ve made them. Sometimes book sales can happen as a result of a combination of two or more different methods, and even after the fact, you may not know which methods played a role.
Most of these approaches are free, except for your time, so I say, try as many of these book marketing methods as you can.
See the tips at http://www.florenceosmund.com/marketing_your_book