Canny, Nicholas, and others, ed.Oxford History of the British Empire. Oxford University Press, 1998-2001. A five-volume comprehensive assessment of the British Empire.
Hobsbawm, Eric.The Age of Empire, 1815-1914. Knopf, 1987. Traces events and ideas that brought power and wealth to the few, prosperity and stability to some, and hard work and a struggling existence to most.