I tried to find more recent information, but, like you, could not. My copy is the Fourth edition, dated 1990. I refer to it frequently, and it is beginning to show the wear. I'd like to get a copy for the local historical society, too. The township maps, the list of villages and whistlestops, counties and townships, rivers and streams, etc. are very helpful. If anyone knows if SW PA Genealogical Services is still selling these books, and the current price, please share the information.