Cadernos Ultramares seeks to present Brazilian culture and thought in a qualified way, through volumes bringing together important essays by renowned authors in different areas of knowledge. In April 1968, Rogério Duarte, graphic designer and one of the main names in tropicalism, was arrested and tortured by the military dictatorship after participating in the important Passeata dos 100 Mil in Rio de Janeiro. Upon leaving prison, he wrote "A grande porta do medo" (The great door of fear), a long essay and account of torture, which would remain unpublished for over 35 years and finally gains its definitive version in this book, a fundamental testimony for understanding political repression in Brazil.