After 90-year-old Peggy Smith dies of natural causes, her caretaker Natalka notices that she had a huge number of crime thrillers. Each book includes a mysterious postscript: "PS: for PS." When a gunman breaks into the flat to steal a book and its author is found dead shortly thereafter, Sikh police Detective Harbinder Kaur begins to think that there is no such thing as an unsuspicious death after all. In this sequel to the Edgar Award winner The Stranger Diaries, Kaur embarks on a road trip across Europe, seeking an elusive killer in real life and in the pages of novels.