One way in which you can promote your mini E-Book is by using traffic exchanges. While using traffic exchanges can mean a number of different things, it is usually meant to be a means of trading impressions on your site for impressions on another site.
If, for instance, your site gets 50 unique visitors each day – and you use a traffic exchange banner, you are then entitled to 50 impressions on someone else's website.
There are some pros and cons to using traffic exchanges. The pros are that they are relatively easy to use and they are a completely free way of getting more traffic to your site, which you might finding intriguing if you are on a low budget. All you have to do is slap a banner or some code onto your site and then wait to get impressions from someone else.
There's one major downside to using traffic exchanges – and that is that impressions don't always translate into click-thrus. Which means you might have 50 visitors view your banner on another site, but only one might click through, which means you have traded 50 impressions on your site for one visitor.
In addition to these traffic exchanges, you will find the type of traffic exchange model that http://www.trafficswarm uses, which is quite different. Rather than exchanging banners or code, you are given code to insert into your website. Everytime someone visits, you gain points, which then go toward auto-surf credits. People who visit traffic swarm and surf through the pages will then be forced to view your page for 30 seconds at some point in order to gain credits themselves.
If you're looking for free exposure for your mini E-Book, using traffic exchanges might be a good option, even if they aren't always as highly-effective as more expensive forms of advertisement.