Not to put a wrench into your research, but I found that book link, too, but it's NOT the same E.S. Carter. (Keep in mind "Carter" is a very common name.)
The E.S. Carter you're looking for in connection with the cover is one Edward S. Carter formerly of Jersey Shore, Pennsylvania and later from Keokuk, Iowa. Here's a basic genealogical research information link that connects the above cover to both Jersey Shore, PA and Keokuk, IA:
http://genforum.genealogy.com/carte...s/12303.htmlA US Census review of Edward S. Carter of Keokuk, Iowa, who's wife was Mary (agrees with the above link) was a salesman by trade and appears to have been an inventor of sorts, involved in some patents for a railroad car coupling and boot blacking case, as shown in the links below:
http://www.google.com/patents/US273950http://www.google.com/patents/US53111I have no idea if any of those patents were actually marketable, but at least he had patent rights to them.
Obviously, more research is needed.