For Whom the Bell Tolls is a novel by Ernest Hemingway published in 1940. It tells the story of Robert Jordan, a young American volunteer attached to a Republican guerrilla unit during the Spanish Civil War. As a dynamiter, he is assigned to blow up a bridge during an attack on the city of Segovia.
Why The cover grabs attention and quickly conveys the tone of the novel.
How The colors of the Nationalist faction immersing the rabbit motif highlight the guerrilleros' vulnerable position.