Headhunters by Jo Nesbø

Roger Brown has it all: Norway's most successful headhunter, he is married to a beautiful gallery owner and owns a magnificent house. But he's also a highly accomplished art thief.
At a gallery opening, his wife introduces him to Clas Greve. Not only is Greve the perfect candidate for a position that Brown is recruiting for; he is also in possession of 'The Calydonian Boar Hunt' by Rubens, one of the most sought-after paintings in modern art history.
Roger starts planning his biggest theft ever. But soon, he runs into trouble - and it's not financial problems that are threatening to knock him over this time...