Charles Oman 
Revival: Studies in the Napoleonic Wars (1929) [PDF ebook] 

This book presents a general summary of the views on the history of the world held by various historians‘ perspective. Rest of the book is derived from author’s main work of 20 years on the Napoleonic period.Narrative includes four stories of the Secret Service that illustrate in different fashions the underworld of political and military intrigue which escapes notice in other general history work.Some of the material included in this book is derived from the study of the British tactics before the Peninsular War and helps to comprehend Duke of Wellington’s methods of warfare with Napoleon and his armies. Discussion is included on Napoleon’s system of using his cavalry as a generalization with a specific study of the handling of the cavalry by his generals in the Spanish War.