I am very familiar with S-K Publications, based in Wichita KS--in fact, knew when John Shunk started his company. These are Census books thru 1850, actual photographed pages (not transcribed by individuals) with a surname index. I have the complete set from 1800 thru 1850 for Armstrong Co. These books are extremely good, and a real addition to anyone's library. John does not have many such for PA because the counties were so large, but was convinced by a number of us to do Armstrong since many of us have roots there. For information on inventory, prices and general information you may go to: http://www.skpub.com Sharon A Huffman sharhuff@ aol.com