ZUBER, Terence. “The Battle of the Frontiers Ardennes 1914”. (Tempus Publishing Ltd., Stroud, Gloucestershire, 2007)
I knew about the Ardennes in the Second World War but I'm ashamed to admit I did not know of the significance of the area in the First World War, in spite of having driven through there many times.
Terence Zuber, a retired American Army Officer, has 'walked the battlefield' and gives a fascinating, step by step account of the fighting that took place in the early days of the First World War. He also explains the build up to WW1 - the 'war to end all wars' - with background information, statistics and details of what happened after the Franco-Prussian War 1870 - 1871, when France lost territory to Germany. Terence Zuber also has an interesting website: http://www.terencezuber.com/ardennes.html
To my mind, this book is an excellent starting point for anyone interested in the First World War.