Step back in time and witness a turbulent time period for the Unites States: the Great Depression through World War II. The past will come to life with well-researched, clearly written informational text, primary sources with accompanying questions, charts, graphs, diagrams, timelines, and maps, multiple prompts, and more. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.