Until the Eighties, Oslo was a rather boring town, but it's changed a lot, and is now much more cosmopolitan. If I go downtown, I visit the harbour to see the tall ships and the ferries, and to admire the modern architecture such as the Opera House or the new Astrup Fearnley Museum on the water's edge.

Many Scandinavian writers who had made their name in literary fiction felt they wanted to have a go at the crime novel to show they could compete with the best. If Salman Rushdie had been Norwegian, he would definitely have written at least one thriller.

I was sleeping in a water bed for a couple of years, recommended by my doctor. I was never comfortable in that water bed. In the middle of the night you would hear something happening - water and bubbles. I would always think there was some intelligent life in the water bed.

Good police officers are ugly.

I'm just an entertainer. In a way crime stories are boring. A crime's been committed and at the end you know it will be solved. So you've got to make the story interesting besides it just being a plot. And that's why character matters, why you've got to make the characters interesting.

For many years, it seemed as if nothing changed in Norway. You could leave the country for three months, travel the world, through coups d'etat, assassinations, famines, massacres and tsunamis, and come home to find that the only new thing in the newspapers was the crossword puzzle.

For me, the best places to write are on planes, trains and at airports. Not hotel rooms but hotel lobbies. I'm really happy when I'm waiting for a plane and the message comes that it's three hours late. Great, I'll get to write!