In this day and age of easy access to almost anything, it makes sense that your published (and copyrighted) work would be at risk. It comes with the territory, I suppose. But it doesn’t mean you have no recourse. Here is some very practical information from Helen Sedwich on Joel Friedlander’s book designer site on content theft.
A Step-by-Step Guide to Dealing with Content Theft by Helen Sedwick — The Book Designer.
Christine Keleny
CKBooks Publishing
Where Publishing Dreams Become Reality