In her new book, “Aspen and the American Dream: How One Town Manages Inequality in the Era of Supergentrification,” Stuber, an associate professor of sociology at the University of North Florida, explores how the Aspen of her childhood has shifted in an era of “supergentrification.” While the city has managed to maintain a working middle class, thanks in large part to an affordable housing program established in the 1970s, progressive political leadership and creative urban planning, moneyed interests threaten to tip the scales in favor of high-end development. In 2016, the City Council announced a complete moratorium on development. Over 10 months, it rewrote the land-use code to favor residents over developers.