In 1970 a young dancer named Alma Guillermoprieto left New York to take a job teaching at Cuba's National School of Dance. For six months, she worked in mirrorless studios (it was considered more revolutionary); her poorly trained but ardent students worked without them but dreamt of greatness. Yet in the midst of chronic shortages and revolutionary upheaval, Guillermoprieto found in Cuba a people whose sense of purpose touched her forever. In this...