Music is an important part of my writing process.

There are an awful lot of readers who won't pick up a book if they think it's got anything horrific in it, or paranormal or whatever.

The biggest qualification to be a good police officer is to have a high degree of emotional intelligence.

There's a difference between what I call a dumb ghost and a smart ghost. The smart ghost is Hamlet's father - you know, he says, "Get revenge, my son!" That's incredibly rare. It's much more the grey lady in the same place everyday, moving across the floor.

Police do get obsessed with solving crimes. You know, particularly if there's been a murder, it becomes personal for the police officer very quickly, and it gets to the family. Even after they've retired, they carry on, not letting go.

My day starts with Radio 4's Today live or 'listen again' wherever I am in the world, thanks to digital radio - I even have an app on my iPhone that receives it.

Every profession has its own culture, but the police look at the world differently to everybody else. I call it a 'healthy culture of suspicion'.