"Door to Door" by Edward Humes is a non-fiction book that examines the history and impact of the American door-to-door sales industry. The book focuses on the experiences of Kirby Vacuum salesmen and women, who sell high-priced vacuum cleaners directly to consumers in their homes. Through in-depth interviews and research, Humes explores the psychology behind door-to-door sales and the role it has played in American culture and commerce. He also delves into the controversy surrounding the sales tactics used by some companies, including Kirby, and the ethical issues raised by the industry. The book offers a fascinating look at a unique and often misunderstood profession and provides insights into the broader themes of consumerism, marketing, and human behavior.