The Cold Case Quartet Katharina Code

"Katharina went missing twenty-four years ago. Each year on the anniversary of her disappearance, Chief Inspector William Wisting rereads her files, searching for the answer he could never find; the code he could never solve. And he visits Katharina's husband, Martin Haugen, the brokenhearted man he could never help. Until now. This year is different. Another woman is missing under similar circumstances. But so is Katharina's husband. Wisting has to find him, but is he rescuing a dear old friend or playing a deadly game with a killer?"--