Régis Debray studied at the École Normale Supérieure under Louis Althusser, becaming "agrégé de philosophie" in 1965. In the late 1960s he was a professor of philosophy at the University of Havana in Cuba, and became an associate of Che Guevara in Bolivia. He wrote the book Revolution in the Revolution?, which analysed the tactical & strategic doctrines then prevailing among militant socialist movements in Latin America, & acted as a handbook for guerrilla warfare that supplemented Guevara's own manual on the subject. It was published by Maspero in Paris in 1967 & in the same year in New York (Monthly Review Press & Grove), Montevideo (Sandino), Milan (Feltrinelli) & Munich (Trikont). Guevara was captured in Bolivia early in 10/67; on 4/20/67, Debray had been arrested in the small town of Muyupampa, also in Bolivia. Convicted of having been part of Guevara's guerrilla group Debray on 11/17 was sentenced to 30 years in prison. He was released in 1970 after an international campaign for his release which included Jean-Paul Sartre, André Malraux, Général De Gaulle & Pope Paul VI.