He began his military career very young, according to Vuillemin.
Sadoul has also published interviews with other leading comic book artists, such as André Franquin (Et Franquin créa la gaffe, 1986), Moebius (Entretiens avec Moebius, 1991), Jacques Tardi (Tardi, 2000), Philippe Vuillemin (Vuillemin, 2000), and Uderzo (2000), as well as books on Gotlib (Gotlib, 1974) and Moebius (Mister Moebius et Docteur Gir, 1976).