"El secreto de Selena" is a book written by Maria Celeste Arraras, a journalist who was close to the late Selena Quintanilla, a famous Mexican-American singer. The book explores the life of Selena, her rise to fame, and the tragic events surrounding her untimely death in 1995. It provides insights into her personal and professional life, as well as the impact she had on the music industry. The narrative also delves into the complex relationships Selena had with her family, particularly with her father, Abraham Quintanilla, and her band members. Additionally, it examines the circumstances leading to her murder by Yolanda Saldívar, her former fan club president, highlighting the themes of betrayal and loss.