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As far as I know they are all in the Forgotten Realms Campaign Setting. I don't have the book, but I was able to find basic info about Horizkaul's Boom by searching from Google. You may be able to do the same with the others.
I've just put out my first post following Gru's prompt. Is the style okay by you folks? As a total PbP newbie, I thought I'd best ask to be on the safe side. I look forward to gaming with you in any event,