In Cold Blood is a true crime, nonfiction (though this is debatable) book about the 1959 murder of the Clutter family (the father, mother, and two children) by Perry Edward Smith and Richard "Dick" Hickock. Truman Capote apparently read about the murders in the newspaper and headed down to the small town of Holcomb, Kansas with his good friend, Harper Lee, to interview everyone involved with the case. (I also read that the New York Times gave Capote a choice between writing about this case and writing one about following a cleaning woman around for one day.) 
 I was surprised by how much I loved this book! At first, Capote's writing style struck me as a bit intense--he is verbose throughout the narrative, but once you get used to it, you can't put it down. You want to know EVERYTHING about everyone involved in the crime and the prosecution of the criminals. There's so much to talk about in this book: morality, crime, the criminal justice system, Capote's writing and whether it can be considered "nonfiction" or not. 
 I saw the movie by the same name starring Philip Seymour Hoffman when it came out and I've wanted to read the book ever since. Now I want to watch the movie again!