The historiography of French and British experiences on the Iberian Peninsula in the opening decade of the nineteenth century lacks neither depth nor breadth. New entries into this crowded field often face significant scrutiny to see if they truly present anything different than the thousands of previous offerings. In Spying for Wellington: British Military Intelligence in the Peninsular War, Dr. Huw Davies has combined the underappreciated topic of intelligence with the well-trodden topic of Wellington to outline just how the British forces managed to knew so much about the French intentions and actions, often seemingly before the French knew themselves. In so doing, Davies has enriched the study of the Napoleonic era.