You've met a new man who seems too good to be true. He's charming, confident and impulsive. He shares so much in common with you and you seem to be the perfect match.

But things aren't quite as they seem; you soon realise his charm doesn't run deep, he gets bored easily, he's irresponsible and he has a string of exes and one night stands in his wake, he thinks a lot of himself but little of others. Or perhaps your boss takes too many big risks and treats you like a pawn in their game or your friend is always asking favours of you. The psychopath in your life is probably in disguise - they could be your lover, your child, your colleague, your friend or the hot new date you've met on the internet.

So how do you know if someone close to hand isn't quite who they seem? For fans of Jon Ronson's The Psychopath Test, in The Psychopath in Your Life, 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. PREVIOUSLY PUBLISHED AS THE DEVIL YOU KNOW