When he disappeared from Curitiba, abandoning a successful career as a university professor and a seemingly happy marriage, Frederico Rennon left behind only a few computer-written letters addressed to actress Sara Donovan. The initial messages are almost formal, and gradually the exchanges take on new meaning as the professor and the actress become entwined in an unlikely passion. However, the progressive decline of the professor's virtuous image is commented on, challenged, and ridiculed by his son, who, after his father's definitive disappearance, decides to turn the story into a book. Cristovão Tezza entangles the reader in the clash between these two conflicting versions. Which account should we trust: the letters of the respected professor whose life is turned upside down after falling in love, or the narrative of his son, the family's black sheep? • An unpublished preface by the author, in which he explains the creative process of the novel, written in the United States in 1994, when he was in the Ledig House program of the American foundation ART/OMI. • The publication of The Eternal Son, in 2007, had an unprecedented impact on the country's fictional panorama: the book won the most important Brazilian literary awards (among them Jabuti and Portugal Telecom) and has already been translated in a dozen countries.