This is a wonderful mystery and suspense novel. "Seven Deadly Sins: Serial Sins" adopts the frame form of a big story within a small story commonly used in folk literature, that is, the whole work is a main line mystery and suspense story as a whole (big frame), and seven weird, horror or mystery stories (small frames) that can exist independently and are inserted into it. It is also the first of the author's "Serial Insertion" series of works. The plot of the whole book is tense, intricate, and interspersed, forming a maze-like theme structure.
