Some sources:

Broers, Michael. Europe Under Napoleon. (Hodder Education)

Grab, Alexander. Napoleon and the Transformation of Europe. (Palgrave)

Schroeder, Paul. The Transformation of European Politics, 1763-1848. (Oxford) A standard word on the politics of the era

More contemporary sources:

Alison, Archibald. History of Europe from the Commencement of the French Revolution in 1789 to the Restoration of the Bourbons in 1815 (1833–1843, 10 vols.) Basically a year by year history of the era.

New Annual Register (1811 and 1812) Published annually. contains numerous documents and contemporary news reports