Tammy,
I have a bunch of Brandon Wiegand's books myself, and they are excellent references. I have the 1st Army book at home, so I'll look up your grandfather when I get home from work. If he's not listed there, I'd recommend getting the 5th Infantry Division's book. There is also an index to the GO's of the 11th Infantry Regiment, which I'd also recommend picking up. You're more likely to find him listed in the Regimental or Divisional books.
Brandon's website is
DDay Militaria and he also sells the Indexes on eBay under the screename ddaymilitaria.
Love the display you did
