Alamo in the Ardennes, by John C. McManus
Available at Amazon:
http://www.amazon.com/o/ASIN/0471739057/ref=s9_asin_image_1/105-6167534-1529267?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-4&pf_rd_r=0NSVMQKCVTZ5VQ4Z3B44&pf_rd_t=101&pf_rd_p=288448701&pf_rd_i=507846