The Destroyers. And I liked it very much - it's an excellent thriller, it reminded me of an Agatha Christie book for 21st century adults, also made me think of J.K. Rowlings' A Casual Vacancy for its convincing depiction of a small community, with all its petty secrets behind apparently normal and boring provincial lives. Bollen's writing is rich and beautiful, some scenes seem a little too long, because one wants to know what will happen next - the essence of a true page turner. There are some clever twists, and the scene on the ice near the end feels eerie, it reminded me of Peter Hoeg's Smilla.
A very good book, I recommend it.