Ardennes-Alsaceis a brochure written by Roger Cirillo at the U.S. Army Center for Military History. This is an excellent overview of the Ardennes-Alsace campaign during World War II. The narrative covers operations at a very broad level, so it does not go into deep detail on the actions of all the individual units that fought in the Battle of the Bulge, but it gives the reader a great overview of the ins and outs of Allied and German operations and strategy during the campaign.
I would strongly recommend this brochure to anyone who is interested in World War II history to gain a broad understanding of the Battle of the Bulge.