About the book (from Wikipedia):
For Whom the Bell Tolls is a novel by Ernest Hemingway published in 1940. It tells the story of Robert Jordan, a young American in the International Brigades 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. The novel is regarded as one of Hemingway’s best works, along with The Sun Also Rises, The Old Man and the Sea, and A Farewell to Arms.
The novel graphically describes the brutality of the civil war in Spain during this time. It is told primarily through the thoughts and experiences of the protagonist, Robert Jordan. It draws on Hemingway’s own experiences in the Spanish Civil War as a reporter for the North American Newspaper Alliance.