As an extension of his work on symbolism and Mallarmé, he is currently exploring the links among photography, literature, painting, music, and cinema. His publications include Mallarmé. De la lettre au livre (Le mot et le reste, 2010); Alpinisme et photographie (1860–1940) (with Michel Jullien) (L’amateur, 2006); and La Négation à l’œuvre. La philosophie symboliste de l’art (1860–1905) (PUR, 2005).