Michael Burleigh, The Third Reich: A New History (2001). A fresh and thorough look at the Nazi era in Germany’s history.

John Keegan, The Second World War (2005). A comprehensive account by a well-known scholar.

Bernd Martin, Japan and Germany in the Modern World (1995). A comparative study of these two countries’ modern history and the relationship between them.

Mark Mazower, Dark Continent (2000). A history of Europe in the twentieth century that views the era as a struggle among liberal democracy, fascism, and communism.

Michael S. Nieberg, Fighting the Great War: A Global History (2006). An exploration of the origins and conduct of World War I.

Dietman Rothermund, The Global Impact of the Great Depression, 1929–1939 (1996). An examination of the origins of the Depression in America and Europe and its impact in Asia, Africa, and Latin America.

First World War.com, http://www.firstworldwar.com. A Web site rich with articles, documents, photos, diaries, and more that illustrate the history of World War I.

“The Holocaust,” http://www.jewishvirtuallibrary.org/jsource/holo.html. A wealth of essays, maps, photographs, and timelines that explores the Holocaust and the context in which it arose.