"For Whom the Bell Tolls" is a novel written by Ernest Hemingway, published in 1940. Set during the Spanish Civil War, it follows an American dynamiter named Robert Jordan who is working with a group of guerrilla fighters. The story explores themes of love, sacrifice, and the impact of war on individuals and society. The title of the book is derived from a line by the poet John Donne, emphasizing the interconnectedness of humanity. As Robert Jordan grapples with his mission and his feelings for a young woman named Maria, the narrative delves into the moral complexities of war and the human condition.