On Tuesday I got a message from a friend asking if I could account for my whereabouts after the book-signing event on Sunday. He attached a link to a local news story. A body had been pulled from the water in Amsterdam’s Vondelpark, very near the site of a similar crime scene almost twenty years ago – a crime scene that inspired my debut thriller Calvin’s Head. The book I spent Sunday afternoon signing. The book that begins with the grisly murder of a man called Valentine, whose remains are discovered in a Vondelpark pond.