How many times have you despaired about how to handle your psycho boss or listened to your friend talk about how their dream date turned out to be a bit of a psychopath? It's far from just a turn of phrase, psychopaths aren't all serial killers or criminals as you might expect, they are seemingly ordinary people too. In fact around 3% of the general population have strong psychopathic tendencies. The devil you know may be in disguise. So how do you know if someone close to hand isn't quite who they seem? The psycho in your life could be your lover, your child, your colleague, your friend or the hot new date you've met on the internet. In The Devil You Know, forensic psychologist Kerry Daynes explains the psyche of a psychopath, she reveals the behavioural traits they share in common and she gives advice on how to handle them - or better still, how to avoid them at all costs. Using research and high profile case studies, The Devil You Know will help you spot the psycho in your life. The only question is: can you afford not to read this book?