A History of the English People in the Nineteenth Century, by Elie Halevy (HC, ex. lib., six volume set, 1949, $40. No complete set is listed on the internet, and most of these books go individually for $15, so this is a steal.
The 6 volumes:
England in 1815
The Liberal Awakening
The Triumph of Reform
Victorian Years
Imperialism and the Rise of Labour
The Rule of Democracy
Look for them in a box on the floor of the European History Section.