Book excerpt: Interest in family history is at its highest. Young people want to know where they came from, as well as the people who built their family and their country. Genetic Genealogy is an exciting new field that can help in tracing lineage and finding a haplogroup to see where a person's ancestors traveled. DNA: Window to the Past explains all about genetic genealogy, what is DNA, why it is important, and how it can be useful in learning more about a person's heritage. Readers explore their own and other people's pasts, creating an understanding of the opportunities and challenges that built this nation. ABDO & Daughters is an imprint of ABDO Publishing Company.