Jean-Claude Bartoll was an investigative journalist for press agencies such as Gamma TV and Sygma TV. He has investigated drug trafficking in Colombia, the slave trade in the Dominican Republic, and European mercenaries in Africa, among other human, political and financial issues around the world. Along with writing the Insiders series, he is also a filmmaker and has adapted comics for TV. Renaud Garetta has drawn the successful series Fox One written by O. Vidal (2007, Editions du Cameleon).