Rule One: Nothing is right, nothing is wrong. Rule Two: Be careful. Rule Three: Fight using your legs whenever possible, because they're the strongest part of your body. Rule Four: Hit to kill. The first blow should be the last, if at all possible. Rule Five: The letters are the law. Kit takes her role as London's notorious "Perfect Killer" seriously. The letters and cash that come to her via a secret mailbox are not a game; choosing who to kill is not an impulse decision. Every letter she receives begins with "Dear Killer," and every time Kit murders, she leaves a letter with the dead body. Her moral nihilism and thus her murders are a way of life-the only way of life she has ever known. But when a letter appears in the mailbox that will have the power to topple Kit's convictions as perfectly as she commits her murders, she must make a decision: follow the only rules she has ever known, or challenge Rule One and go from there. Katherine's Ewell's Dear Killer is a sinister psychological thriller that explores the thin line between good and evil and the messiness of that inevitable moment when life contradicts everything you believe.