Jo Nesb? (born 29 March 1960) is a Norwegian writer, musician, economist, and former soccer player and reporter. More than 3 million copies of his novels had been sold in Norway as of March 2014; his work has been translated into over 50 languages, and by 2021 had sold some 50 million copies worldwide, making him the most successful Norwegian author of all time. Known primarily for his crime novels featuring Inspector Harry Hole, Nesb? is also the main vocalist and songwriter for the Norwegian rock band Di Derre. In 2007 he released his first children's book, Doktor Proktors Prompepulver (English translation: Doctor Proctor's Fart Powder). The 2011 film Headhunters is based on Nesb?'s novel Hodejegerne (The Headhunters).