For fans of gripping Scandinavian detective stories, strong heroines, and detailed “procedural” novels that reveal the secrets of police work: “Green Dust,” the first novel by Danish author Sara Blaedel in a whole series of detective adventures about Louise Rick. In the park they find the body of a young woman—she was strangled. In the back alleys of a luxurious Copenhagen hotel, a journalist is killed. Detective Louise Rick takes on the investigation, and very soon discovers that the two crimes are obviously connected, and that her friend Camille, a journalist, knew the murdered man. Louise tries to protect Camille, but she has gone too far…