Marie Sellier was born in 1953 and authors books for children. Her book, What the Rat Told Me, was first published in France in 2008. It was later published in the USA, Great Britain, Canada, Australia, and New Zealand in 2009, and in China in 2014.

Sellier is a graduate of the Paris Institute of Political Studies. Before focusing on writing and publishing her first collection, Enfance De l’Art, she was a journalist. Throughout her career she has pursued an interest in working with modern artists, and has written documentary films on painters and sculptors.