Phantom' was for me an interesting technique of telling the story. You have one voice that it is in the present telling what is happening, and then there's one voice from the past that's also driving the story forward. And you know that the two story lines will meet eventually.

Revenge is the thinking man's reflex, a complex blend of action and consistency no other animal species has so far succeeded in evolving. Evolutionary speaking, the practice of taking revenge has shown itself to the so effective that only the most vengeful of us have survived.

What we humans think we know is nothing compared to what we need to believe to numb the fear and pain.

A moral person is someone who accepts the consequences of their own morality, not those of others.

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'm not a big crime reader, but I'm reading Michael Connelly's 'The Reversal.' I'm going back to his novels. I'm also reading Keith Richards' 'Life.' I'm always fascinated by the transition from the innocent late '60s and early '70s and the youth culture becoming an industry.