World War I: The Essential Reference Guide
Essential Library of World War I: World War I Causes
Essential Library of World War I: World War I Aftermath
Critical Insights: Holocaust Literature
Frontline Families: World War II: Frontline Soldiers and Their Families
Tech in the Trenches: Strategic Inventions of World War I
Doomed!: The Hindenburg Disaster
Essential Library of World War I: Harlem Hellfighters
Auschwitz, Bergen-Belsen, Treblinka: The Holocaust Camps
Cause & Effect in History: World War II
Wiesel, Wiesenthal, Klarsfeld: The Holocaust Survivors
Understanding the Holocaust: Holocaust Resistance
Wars That Changed History: 50 of the World's Greatest Conflicts
Defining Documents in American History: World War II (1939-1946)