Harry Hole (the surname pronounced as "HOO-leh"), whose name translates to "Harry Hill" in English and is also called "Harry Holy" by allies in the Australian police force, is the main character in a series of crime novels written by Norwegian author Jo Nesbø. The name is derived from Old Norse Hólar, the plural form of hóll, meaning "round and isolated hill." Harry's surname is also the name of a historic Norwegian town (Hole, Norway) with a heritage that goes back to the Viking Age. In his stories, Hole is a brilliant, introverted, and obsessively driven detective. He has few friends and often clashes with colleagues, but his work and skill are so widely known and respected that he is considered a specialist, leading him to sometimes consult on cases in other cities and countries. Throughout the novels, he sometimes uses unorthodox and illegal methods in his investigations. A common focus of the novel series is Hole's struggles with alcoholism and depression, as well as how his mental health suffers as a result of his morally questionable actions and the brutal nature of the crimes he investigates. The novel series eventually shows Hole recognizing the harmful nature of his work and increasingly problematic behavior, prompting him to leave the police force. Despite this, later novels show Hole continually finding reason to return to Oslo and assist new criminal investigations, despite his own initial reluctance and the protests of his loved ones. Critics liken the personality of Harry Hole to those of the famous literary detectives such as Sherlock Holmes, Hercule Poirot, Jules Maigret, and Nero Wolfe. According to Jo Nesbø himself, the character is inspired by and a tribute to Michael Connelly's character Harry Bosch. The novels are frequent bestsellers. Character Harry Hole is introduced in The Bat as a police officer with the Oslo Crime Squad. Born in 1965, Harry's mother, a descendant of the Sami people, dies due to cancer while he is in his twenties. Harry never has a close relationship with his father Olav, a former teacher, but is deeply attached to his younger sister Søs, who has Down syndrome. Taxi driver Øystein Eikeland is an old school friend of Harry's and one of the few people he is close to. Introverted and prone to depression, Hole is a chain-smoker alcoholic when first introduced, though he later recognizes his addiction and is considered a recovering alcoholic