So far I've had one online sale of the book in hard copy, compared to about a dozen of the ebook. I think the good reviews I've received really helped, but they only appear on the ebook right now, and only on the USA Amazon.com.

I've also committed to $30 of advertising on goodreads, which so far has provided absolutely no sales. It could be the quality of my advertisements - I tend to do a poor job pitching the book.