Harry Hole is a fictional character created by Norwegian author Jo Nesbø. He is a detective known for his unconventional methods and complex personality, often battling personal demons such as alcoholism. The character appears in a series of crime novels, starting with "The Bat" in 1997. Set primarily in Oslo, Norway, the Harry Hole series explores various criminal cases, often involving intricate plots and psychological depth. The books have gained international acclaim, making Jo Nesbø one of the best-selling authors in the crime fiction genre.