In January 2013, I published Topsight via Amazon CreateSpace. Since then, it's been used in graduate and undergraduate courses in technical communication across the country and I've had the pleasure of talking with people in person and on Skype about how the book has been useful to them. The response has been better than I hoped.
If you haven't picked up Topsight yet, this is a good time to do so: I just lowered the price of the print version from $24.99 to $19.99, making it even easier to pick the book up out of curiosity, assign it to classes, or hand it out as a party favor at a research-themed party. The Kindle version should also drop in price in the near future.