The sun descends reluctantly over Norway's waterside capital, but novelist Jo Nesbo is determined to show Oslo's dark side, to convince me the real city, in parts, is as dirty, twisted and seedy as his own fictional version.
It's a tough sell in this city of bike helmets, clean streets and smiling blond people.
The author has written nine successful novels about the reckless Oslo police detective Harry Hole, a nonconformist with a mercurial mind.
Hole's most meaningful relationship is with bourbon, by the bottle.
