The Ploughmen is not the novel you want to pick on a day when you are feeling low: it’s pretty bleak. But the story of a lonely police officer, assigned to the night shift to get an insomniac serial killer to reveal where his victims are buried — and meanwhile losing his wife and his mind — is just about perfect. It’s told elegantly, sparely, and with all the nuances that respect that human beings are never all good or all bad.
Just make sure you have some uplifting experience to await you afterwards. Not much hope here!