Defining Documents in American History: Civil Rights (1954-2015)
Decades of the 20th and 21st Centuries: The 1960s
Tech in the Trenches: Strategic Inventions of the Cold War
The Louisiana Purchase and Westward Expansion
Defining Documents in American History: The Cold War (1945-1991)
Essential Library of World War I: Women in World War I
Decades of the 20th and 21st Centuries: The 2000s
The World of the American West: A Daily Life Encyclopedia
Timeline Trackers: Westward Expansion: A Timeline History of the Transcontinental Railroad
Tech in the Trenches: Strategic Inventions of World War II
Defining Documents in American History: The 1950s (1950-1959)
Primary Sources of the Abolitionist Movement: The Women's Rights Movement and Abolitionism
Explorers of the American West: Mapping the World through Primary Documents
Influential Women: Malala Yousafzai
World War II: The Definitive Encyclopedia and Document Collection