Grounded in extensive research and reporting, Spy Schools reveals that globalization—the influx of foreign students and professors and the outflow of Americans for study, teaching, and conferences abroad—has transformed U.S. higher education into a front line for international spying. In labs, classrooms, and auditoriums, intelligence services from countries like China, Russia, and Cuba seek insights into U.S. policy, recruits for clandestine operations, and access to sensitive military and civilian research. The FBI and CIA reciprocate, tapping international students and faculty as informants. Universities ignore or even condone this interference, despite the tension between their professed global values and the nationalistic culture of espionage.