Here are some less well known resources, share yours:
Peter Mansoor, The GI Offensive in Europe: The Triumph of American Infantry Divisions, 1941-1945
https://www.amazon.com/GI-Offensive-Europe-Divisions-1941-1945/dp/070060958X/ref=sr_1_48?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525214&sr=1-48
Paul Jeffers, Onward We Charge: The Heroic Story of Darby's Rangers in World War II
https://www.amazon.com/Onward-We-Charge-Heroic-Rangers/dp/0451221281/ref=sr_1_63?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525413&sr=1-63
Joseph Balkoski, From Brittany to the Reich: The 29th Infantry Division in Germany, September - November 1944
https://www.amazon.com/Brittany-Reich-Infantry-Division-September/dp/0811711684/ref=sr_1_83?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525413&sr=1-83
Samuel Mitcham, The Desert Fox in Normandy: Rommel's Defense of Fortress Europe https://www.amazon.com/Desert-Fox-Normandy-Rommels-Fortress/dp/0815411596/ref=sr_1_106?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525413&sr=1-106
G.H. Bennett, Destination Normandy: Three American Regiments on D-Day
https://www.amazon.com/Destination-Normandy-American-Regiments-Stackpole/dp/0811735354/ref=sr_1_107?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525413&sr=1-107
Matthew Cooper, German Army 1933-1945 https://www.amazon.com/German-Army-1933-1945-Matthew-Cooper/dp/0812885198/ref=sr_1_135?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525851&sr=1-135
J.E. Kaufmann, Fortress Europe: European Fortifications of World War II https://www.amazon.com/Fortress-Europe-European-Fortifications-World/dp/1580970001/ref=sr_1_136?m=A374VS59X5ED68&s=merchant-items&ie=UTF8&qid=1475525851&sr=1-136