"The Laughing Policeman" is a detective novel written by Swedish author Maj Sjöwall and Per Wahlöö. Published in 1968, it is part of the Martin Beck series, which follows a team of detectives in Stockholm. The story begins with the murder of a police officer, leading to an investigation that uncovers a web of crime and corruption. The novel is notable for its realistic portrayal of police work and social issues in Sweden during the 1960s. It combines elements of mystery and social commentary, reflecting the authors' critique of contemporary society while engaging readers with a gripping narrative.