Bestselling author, Adam Haslett, defines the existential origin of evil as the refusal to acknowledge and confront our own mortality. He picks the best books on evil.

When reading books, we often empathize with a main character and find redemption in our emotional response to their fate. But it's more important to think, says Bosnian novelist Aleksandar Hemon. Here, he picks the best books on 'man's inhumanity to man.'