Paul Ryan is author of Paul Valéry sous le signe de l'art et des artistes (2019) and Paul Valéry et le dessin (2007) prefaced by Martine Rouart, Valéry's granddaughter. He has been a member of the Valéry group of the ITEM (CNRS-École Normale Supérieure) for over twenty years and with whom he published six volumes of the series Paul Valéry Cahiers 1894-1914. He also worked as a translator of the series Paul Valéry Notebooks and participated in the digitization of the Cahiers with the Sorbonne University. He is currently editing the correspondence of Paul Valéry and his wife Jeannie for publication by Gallimard.