Writers, especially writers who publish their books independently, need to spend a lot of time marketing. That’s because the US is glutted with books: three million new titles published each year. How is a potential reader to know of a book unless they hear about it somewhere? Marketing is necessary.

I’ve been marketing Exit Velocity (and, at the same time, my other books) in many different ways. But one way that I never got around to trying (because I was busy with other ways!) was marke...