Essential Library of World War I: Harlem Hellfighters
World War I: The Essential Reference Guide
Military Technology: Top Secret Clearance: Tanks of World War II Up Close
Frontline Families: World War II: Frontline Soldiers and Their Families
Essential Library of World War I: World War I Causes
Resisting the Holocaust: Upstanders, Partisans, and Survivors
Essential Library of World War I: Trench Warfare
The Russian Revolution: The Fall of the Tsars and the Rise of Communism
Essential Library of World War I: Women in World War I
World War II: The Definitive Encyclopedia and Document Collection
Frontline Families: World War I: Frontline Soldiers and Their Families
Primary Sources in U.S. History: World War II
Defining Documents in American History: The 1900s (1900-1909)
Essential Library of World War I: Medicine on the Battlefield
Tech in the Trenches: Strategic Inventions of World War II