Karl Stig-Erland "Stieg" Larsson (, Swedish: [ˈkɑːɭ stiːɡ ˈæ̌ːɭand ˈlɑ̌ːʂɔn]; 15 August 1954 – 9 November 2004) was a Swedish writer, journalist, and activist. He is best known for writing the Millennium trilogy of crime novels, which were published posthumously, starting in 2005, after he died of a sudden heart attack. The trilogy was adapted as three motion pictures in Sweden, and one in the U.S. (for the first book only). The publisher commissioned David Lagercrantz to expand the trilogy into a longer series, which has six novels as of September 2019. For much of his life, Larsson lived and worked in Stockholm. His journalistic work covered socialist politics and he acted as an independent researcher of right-wing extremism.