Paradoxically, Mr Alfredson has managed to keep the book's slow, cerebral mood while at the same time speeding up the narrative about agents and double agents.

Analysis of the double-level narrative mechanism is of great significance to the understanding of both the narrative intention of the movie and connotation of the story.

This article will analyze its artistic charm from three aspects - the first-person narrative point of view, double narrative point of view and unreliable narrator.