The third edition of the "Cornerstones of Freedom" series invites young readers to become history investigators—examine the evidence, people, and witnesses to bring history to life. This title offers comprehensive coverage of all concepts related to the nuclear age beginning in the late 1800s through current times. "Setting the Scene" poses questions about scientist's experiments for the beneficial or risky use of nuclear power. Four chapters highlight issues that emerge—birth of the new age, cold war, atom's legacy and human dilemma. The easy-to-read text engages readers in topics about the atomic bomb, Hitler versus allies, international competitions, precautions, peaceful pursuits and cleaner sources of energy. Multiple features add detail and depth of information. "The Story Continues" (back matter) focuses on the uncertain future and responsible use of energy. Sidebars spotlight events of the times and expand clarity and knowledge—Yesterday's Headlines, Views from Abroad, Firsthand Look (speeches, photos, letters, treaties, and guidelines), Today's Perspective and Spotlights. Photography brings alive the times and events of history. Other enrichment opportunities for students include maps that showcase major sites of nuclear accidents and detonation incidents, influential documents, timelines, living history (online primary resources, books and web sites) and glossary. The narrative of this informational title is complemented with bold, bright captions and colorful highlights that will tempt readers and includes a table of contents and index. Timely coverage of the basic information about nuclear energy, dangers and weapons serves as an excellent aid for research assignments and instructional purposes. Recommended resource to support social studies curriculum for grades four through six.