Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Nazi Germany maintained concentration camps throughout the territories it controlled. The first Nazi concentration camps were greatly expanded in Germany after the Reichstag fire in 1933, and were intended to hold political prisoners and opponents of the regime. The number of camps quadrupled between 1939 and 1942 as Jews, political prisoners, criminals, homosexuals, gypsies, the mentally ill and others were incarcerated, generally without trial or judicial process. After 1939, with the beginning of the Second World War, concentration camps increasingly became places where the enemies of the Nazis were enslaved, starved, tortured and killed. This book studies Nazi concentration camps including Nisko plan, extermination through labor, badge of shame, yellow badge, Action T4, gas van, and the list of Nazi concentration camps. Project Webster represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Project Webster continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge.