Detective Harry Bosch is a fictional character created by author Michael Connelly. He is a former LAPD homicide detective known for his relentless pursuit of justice and his strong moral code. Bosch often works on complex cases that delve into the darker aspects of human nature, reflecting his own troubled past. Bosch first appeared in the novel The Black Echo in 1992 and has since become a central figure in a series of books. The character has also been adapted into a successful television series titled Bosch, which further popularized his story and the gritty world of crime investigation in Los Angeles.