Paris-Sorbonne University.
He has written numerous biographies of France"s great queens, all published by Editions Pygmalion. His most celebrated books, L"affaire Louis XVII (Tallandier, 1995, 2000) and Louis XVII: la vérité (Pygmalion, 2000) have attracted intense interest from the public and the media due to their groundbreaking analyses of deoxyribonucleic acid research on a human heart long-supposed to be that of Louis XVII, dead in Temple Tower, Paris, in 1795. He published, in June 2009, an edition of the Journal du comte de Chambord (1846–1883) (Editor Oeil - Forex de Guibert), the never published Diary of Henri, comte de Chambord, the last Bourbon Pretender to the French Crown.
In May 2010, he published a nonconformist biography of the French king Henry IV: "Henri IV, les réalités d"un mythe" (Editor de l"Archipel).