Jussi Adler-Olsen is a Danish author of Scandinavian crime fiction. He is best known in English-speaking countries for his Department Q series. His novels have been sold in 36 countries around in the world, including the United States, United Kingdom, Sweden, Spain, Russia, The Netherlands, Japan, Germany and China. He was the most popular author in Germany in the year 2011, despite not being German.
Jussi Adler-Olsen became a published author in 1985 with a non-fiction book on Groucho Marx. His first foray into fiction was ALFABETHUSET (THE ALPHABET HOUSE) in 1997. His first novel to be published in English was MERCY (UK)/THE KEEPER OF THE LOST CAUSES(US).