Can't seem to find anything on this using search, so here goes...

I can find a few on ebay with good ratings like:

A Time for Trumpets: The Untold Story of the Battle of the Bulge
by Charles B. MacDonald

and

The Battered Bastards of Bastogne: The 101st Airborne and the Battle of the Bulge, December 19,1944-January 17,1945
by George Koskimaki

Are these two of the best? What others should I look for that are well written and offer insight into the battle. Thanks in advance!