The 47th Floor

Detective Shannon Khatri is called to investigate a murder inside a New York City skyscraper. She discovers the work of a sadistic killer who has created a labyrinth of tunnels inside the walls of the building. The killer strikes most often somewhere on or near the 47th floor but leads the determined detective on a chase that extends beyond the perimeter of the building itself as the killer begins to focus his twisted desires on her.
As Shannon's relationship with her live in boyfriend heats up, so does the killers desire to have her for himself, endangering other women along with her entire team as he leads her on a chase that brings the reader into a surprising twist. This not only increases the danger, but could ultimately cost Shannon her life.