Tech in the Trenches: Strategic Inventions of World War II
Essential Library of World War I: World War I Causes
Military Technology: Top Secret Clearance: Warplanes of World War II Up Close
Essential Library of World War I: World War I Aftermath
Frontline Families: World War II: Frontline Soldiers and Their Families
Doomed!: The Hindenburg Disaster
Essential Library of World War I: Harlem Hellfighters
Tech in the Trenches: Strategic Inventions of World War I
Understanding the Holocaust: Hitler's Final Solution
The Attack on Pearl Harbor in United States History
Understanding the Holocaust: Holocaust Resistance
World War I: The Definitive Encyclopedia and Document Collection
Defining Documents in American History: World War II (1939-1946)
Defining Documents in American History: Postwar 1940s (1945-1950)