A fleeting figure dressed in a white party dress roams the streets of southwest Chicago. A long-dead Iowa college student treads the staircase in an old building. A ghostly, plaid-shirted workman plays peek-a-boo with a ticket seller in a Minnesota theater. A phantom wolf prowls Ohio's Jackson and Pike Counties. For decades, journalist Michael Norman has been tracking down spine-tingling tales that seem to arise from authentic incidents in...