He is primarily known for his biographies, where he has covered subjects as diverse as Diego Rivera, Georges Simenon, Jean Moulin and Mary Wesley.
Jean-Paul Sartre | Jean-Jacques Rousseau | Jean Cocteau | Jean Genet | Jean-Luc Godard | Wyclef Jean | Jean Racine | Jean Chrétien | Jean Michel Jarre | Jean Paul Gaultier | Moulin Rouge | Jean Nouvel | Jean-Michel Basquiat | Jean Giraud | Jean Sibelius | Jean-Luc Ponty | Jean-Baptiste-Camille Corot | Jean-Claude Van Damme | Jean Renoir | Jean-Pierre Rampal | Jean-Léon Gérôme | Jean Harlow | Jean Anouilh | Billie Jean King | Jean Giraudoux | Jean-Bertrand Aristide | Jean Baudrillard | Jean-Pierre Thiollet | Jean-Martin Charcot | Jean Gabin |
In 2002 author Patrick Marnham suggested Trepper not only exposed the Soviet agent Henri Robinson but may have been the source that betrayed French resistance leader Jean Moulin.
It is composed of the part of the 5th municipal arrondissement of Marseille situated west of rue Auguste-Blanqui (included), rue Saint-Pierre (included), boulevard Jean-Moulin (excluded), boulevard Baille, rue du Berceau, avenue de Toulon and a part of the 6th municipal arrondissement not part of the canton of Marseille-Vauban.
It is composed of the part of the 5th arrondissement of Marseille south of an imaginary line along rue Saint-Pierre, boulevard Jean-Moulin, boulevard Baille (excluded) and rue du Berceau (excluded) until avenue de Toulon.
However, shortly after the CNR's creation, its president Jean Moulin was arrested at Caluire by the SS.