There are many ways in which you can promote your books. You may be comfortable with one or two (social networking, store events), but if you use an assorted mix you are more likely to reach your prospects in their context. Here are a few examples in the four basic categories of promotion (some used off- or online): Publicity (press releases, social networking, blogging, media appearances, etc), advertising (ads, sales literature, website, direct marketing), sales promotion (pens, pads, coffee mugs) and personal selling (direct sales, personal presentations, telephone, trade shows, store events, networking, etc). Use a variety of these for more effective promotion.