Marc Auchet est professeur émérite au Département d'Études nordiques de l'université Paris-Sorbonne (Paris IV).
Il a été longtemps rédacteur en chef de la revue Nordiques. Il a obtenu le prix Kaj Munk en 1990 et le prix Andersen en 2010 pour ses travaux sur ces deux auteurs danois.
Il est l'auteur d'un grand nombre de publications sur des écrivains danois et norvégiens, ainsi que de plusieurs articles dans Encyclopædia universalis.
Son ouvrage le plus récent est une traduction du Tableau de fleurs de Jan van Huysum, de l'auteur norvégien Henrik Wergeland, publié aux éditions Michel de Maule (2011).
Il a aussi publié une traduction intégrale des Contes et histoires d'Andersen, avec introduction et notes, dans la série La Pochothèque, du Livre de Poche (2005).
Il a dirigé plusieurs ouvrages collectifs, parmi lesquels (Re)lire Andersen - Modernité de l'oeuvre, aux éditions Klincksieck (2007).
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