Here are links to lists of book printers organized by U.S. states, Canada, and overseas.
The Top 150 Off-Set Book Printers in the U.S.
The Top 50 Off-Set Book Printers in Canada and Overseas
I love rainy days with a blanket and a cup of tea and a book!
About John Kremer
John Kremer is author of 1001 Ways to Market Your Books, the Relationships Matter Marketing program, and many other books and reports on book marketing, Internet marketing, social media, and book publicity. -- John Kremer on Book Marketing.
I do not know anything about Mercersburg Printing. Sorry.