Used book – *Ni vue ni connue* by Mary Higgins Clark

As she prepares to sell a beautiful apartment in Manhattan, Lacey Farrell, a young real estate agent, witnesses the murder of the owner. The owner had confided in her about the death of her daughter, Heather, a Broadway actress, in a strange car accident...

Lacey has seen too much: her life is turned upside down. Protected by the police, forced to move and change her identity, she is nevertheless found by the killer – a professional. And the chase begins.