Piracy Trace is a newly launched startup which helps authors and publishers fight piracy. When hired, the company scans pirate sites for an authors work. If iy finds the work then it will send out a DMCA notice.
If that sounds familiar, it should. This is basically the same service offered by Digimarc Guardian (formerly Attributor). Attributor has been doing this for at least 6 years now that I know of, and now it has a cheaper competitor.
And that is a detail which I thought might interest authors and publishers. (Plus, I'm not familiar with any other services like it, though I am sure some exist.)
Piracy Trace is brand new, so I can't tell you if it is effective. But it does offer a free trial, and that interval can be used to test the efficacy.
And this service should be tested; while I was chatting with the developers I learned that they weren't keeping up on the latest ebook piracy news (the ongoing Google Play Books issue).
If they're not keeping abreast of current news then they might not be as invested in the service as you would like. Or, they could be too busy building the service to read the news. Either way, this merits investigation.
P.S. And while we're on the topic, do you know of another service like Piracy Trace? I'd like to learn more.