Northeim, under the pseudonym of "Thalburg", is the subject of William Sheridan Allen's book "The Nazi Seizure of Power" (), a comprehensive study of the success of Nazism at town level. The book describes how the Nazis took over all social groups in the town and Nazified them, but failed to instill positive enthusiasm for the Nazi state. Instead, the population was "atomized" and deprived of the means to express group grievances. The book has been criticized for neglecting the role of the churches, which remained largely autonomous. However, even its critics say that the book is crucial to our understanding of Nazi Germany and has played a key role in shaping scholarship. Imbshausen, the site of a post-World War II British sector Displaced Persons camp, was incorporated into the town in 1974.