Thierry Ségur studied fine arts in Paris. Fascinated by the world of "dungeons and dragons", he soon started working for Casus Belli, a magazine that specialized in these things. Here, he made several short stories with writer Bruno Chevalier. In 1987, Ségur and Chevalier began their first series, 'Les Légendes des contées oubliées'. With this comic, they placed themselves alongside the masters of the heroic-fantasy genre. In 1997, Ségur made 'Le Roi des Méduses' with writer Igor Szalewa, based on a novel by Pierre Bettencourt.