Quotation
a more detailed look at the Franklin Square featured in the book:
http://www.mathpages.com/HOME/kmath155.htm
Here shows many others, first and third squares were featured in the book:
(the sums of corner/center 2X2's and the 4 corners of the first one are 34 as well):
http://mathsforeurope.digibel.be/magic.htm