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. 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.