Nordic noir is a subgenre of crime fiction that originated in the Nordic countries, particularly Sweden, Norway, Denmark, and Finland. It is characterized by its dark themes, complex characters, and a focus on social issues. The stories often feature morally ambiguous protagonists, bleak settings, and a sense of realism that reflects the harshness of life in these regions. The genre gained international popularity through works like Stieg Larsson's "The Girl with the Dragon Tattoo" and Jo Nesbø's Harry Hole series. Nordic noir often explores themes of isolation, corruption, and the impact of crime on society, making it both gripping and thought-provoking.