On the 18th June, 1815 the armies of France, Britain and Prussia descended upon a quiet valley south of Brussels. In the previous three days the French army had beaten the British at Quatre-Bras and the Prussians at Ligny. The Allies were in retreat. The blood-soaked battle of Waterloo would become a landmark in European history, not least because until the evening of the 18th, the French army was close to prevailing on the battlefield. Now, brought to life by the celebrated novelist Bernard Cornwell, this is the chronicle of the four days leading up to the actual battle and a thrilling hour-by-hour account of that fateful day.