All I know is that it contains eight subsectors of the Far Frontiers sector, and some background data. It was done for FASA, but never published. I never found out if you get exclusive rights to it when you purchase it, but since it's come up more than once and I've seen bids on it, I'm assuming that the seller just keeps cranking out copies to sell.
I'd bid if they didn't start at ten bucks, but really, it's not worth that much to me.
Hope that helps,
Flynn