HANS OLAV LAHLUM is a Norwegian crime author, historian, chess player and politician. The books that make up his crime series featuring Criminal Investigator Kolbjørn Kristiansen (known as K2) and his precocious young assistant Patricia are bestsellers in Norway. The Human Flies was the first, and was followed by Satellite People and The Catalyst Killing. Chameleon People is the fourth book in the series.