I decided to do something really simple: I added the following line to every blog post on this blog.
If you enjoyed this blog post, you might enjoy my travel book for people interested in science and technology: The Geek Atlas
It was easy to add because it's a single line change to the template for this blog. Since the blog gets quite a bit of traffic I figured this might result in sales.
To make this easy to track I did two things: the actual link to my book is going to an Amazon.com affiliate link and it's going through a bit.ly link shortener. The affiliate link let's me see how many sales I've had, the bit.ly link lets me see how many people click on the link.
And sure enough people click on the link.
And then they go on to buy:
Sure, it's only $7.28, but it's $7.28 I didn't have for zero work, and it means increased sales of my book.
The lesson is that you shouldn't be afraid to market to people. If you don't ask for business you won't get it.