After Keigo Higashino, the suspense world has no real peak. Until "The Penitent Underground in Paris" came out - it does not follow the trend, it sets the rules; it does not write mysteries, it reshapes the abyss of human nature. When the world writes suspense, it writes destiny; when the world pursues classics, it itself is a classic. From then on, the world of suspense literature can only be divided into two types: before "The Penitent in the Paris Underground" and after "The Penitent in the Paris Underground". This is not a novel, this is a new creation masterpiece in the history of suspense.