Gérard Davet and Fabrice Lhomme, great reporters for the newspaper Le Monde, came to present their new book "Le traître et le néant, Macron l'Enquête" (Éditions Fayard, 2021) on January 20, 2022, at the EJCAM, Marseille site. They also had a long discussion with the students. The meeting was rich in exchanges and included feedback on investigative journalism, punctuated by anecdotes and advice.