In reply to Toreador:
> I've had one of my photos taken from a website and used without permission in a book - I found out when contacted by someone else who had the same thing done. I've found several source of information about what to do when photos are used on other websites, can anyone point me at something similar relating to printed material?
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> Am I right in thinking there is no need to register copyright in order for it to apply?
You are right, although whether it makes much difference in the long run is doubtful. Essentially what you need to do is write to the publishers. They should then apologise and offer to credit you properly when the book is reprinted. They may offer you some money, but I wouldn't hold my breath - if they do, it won't be very much.
However, even if you don't get anything more than an apology, do make the complaint to the publisher. Nicking stuff like this is not acceptable, but as long as people - authors and publishers - get away with it, they will. It's only by raising the issue that people might think twice about doing it.
You could also, if you so wished, expressly forbid them from using any of your work in any future publications. That puts them in slightly deeper shit should they be so stupid as to do it again.