Thomas Mann’s correspondence with French Germanist Felix Bertaux between 1923 and 1948 deals with the writer’s business of foreign translations, contracts, criticism, publicity and lecture tours. It also reflects the development of friendships and the disruptions caused by exile and war. It will be of interest to historians, literary scholars, international relations specialists as well as students and general readers, since the correspondence, made more accessible through its English translation, can be read as a journal of the development of Thomas Mann’s international career and his lasting friendships.