Machado de Assis 
The Blue Parasite [EPUB ebook] 

Camilo, a young doctor who has recently graduated, returns to his hometown in Goiás to reunite with his family. There, he meets Isabel, a beautiful and enigmatic young woman, to whom he is attracted but who seems indifferent to him. However, the girl’s cold demeanor hides a surprising secret, which is revealed as the story unfolds. The tale combines mystery, irony and social criticism, exploring themes such as fate and the illusions of love.