"So Long a Letter" is a novel by Mariama Bâ, published in 1979. It is written in the form of a letter from Ramatoulaye, a Senegalese woman, to her friend Aissatou. The story explores themes of love, friendship, and the challenges faced by women in a patriarchal society. The narrative reflects on Ramatoulaye's life after the death of her husband, Modou, and her struggles with polygamy and societal expectations. Through her reflections, the novel addresses issues of gender inequality and the importance of education for women in Senegal.