Born in 1964 in Lyon, France, Murielle Szac is a journalist and writer. She has been a political journalist as well as the editor-in-chief of three magazines about early childhood. She has also been a television documentary director, and has published a dozen books, including Le feuilleton d'Hermès (Greek mythology in 100 episodes). She is currently an editor with the Bayard group.

In 2008 Murielle created the They Said No ("Ceux qui ont dit non") series for Actes Sud Jeunesse, which she currently directs, as well as the collections "Poés' Idéal" in 2014 and "Sur le fil" in 2015 for Bruno Doucey editions.