"Sister San Sulpicio" is a novel written by author Armando Palacio Valdes. This book reveals the complex world of religious feelings and love. The main character, Sister San Sulpicio, is forced to face her own convictions and inner struggle due to falling in love with a charismatic priest. Falling in love confronts her with challenges and duties as a nun, and also leads to a moral dilemma. The author successfully combines the psychological development of the characters with shades of social problems, creating a tense and exciting plot. "Sister San Sulpicio" is an excellent literary work that will leave a huge mark in the hearts of readers.