Not all those who write philosophy are recognized as philosophers. In this paper I argue that Dutch writer Isabelle de Charrière, usually known as a novelist, is actually engaged in doing moral philosophy. In the second half of the eighteenth century, Charrière wrote novels about characters who endorsed moral theories and commitments. Her novels track the dilemmas that these characters face in trying to live according their moral theories and commitments. I consider the case for treating fiction as philosophically valuable, (...) and argue that Charrière's novels fall into the category of philosophically valuable fiction. (shrink)