Why I'm addicted to self-help books

For the best-selling novelist Sophie Hannah, they contain clues to life's mysteries. What's the best way to tackle a toxic partner, identify a narcissist or feel happier? In this piece for the Guardian, she reflects. "It's no exaggeration to say that The Power of Now changed my life. Like the Ferry Guru's book, it was definitely new agey, but if you took away the spiritual stuff (I wanted to do this at the time; I wouldn't want to now), what remained was a radical new way of looking at the world."