Jussi Adler-Olsen is a Danish author best known for his crime novels, particularly the Department Q series. Born on August 2, 1950, in Copenhagen, he has gained international acclaim for his engaging storytelling and complex characters. His books often blend mystery with psychological depth, appealing to a wide audience. Adler-Olsen's writing career began in the 1990s, but he achieved significant success with the release of his first Department Q novel, "The Keeper of Lost Causes," in 2007. Since then, he has published several sequels, making him one of Denmark's most popular contemporary writers.