Les Âmes grises is a novel by the French author Philippe Claudel. It is a first person narrative which revolves around the murder of a young girl in a small provincial French town near the Western Front in 1917. The book was published in France in 2005 and won the Prix Renaudot. It was also shortlisted for the Prix Goncourt and the Prix Femina. Les Âmes grises has been translated into 28 languages. The British edition, translated by Adriana Hunter, has been released under the title Grey Souls, while the American translation by is called By a Slow River.