The Writer: Only from the Mind of James Patterson

From #1 New York Times murder-thriller author James Patterson, when a world-famous crime writer’s husband is found dead, detectives must uncover if she is the target, the next victim—or a mastermind.
 
NYPD Detective Declan Shaw gets a call: How fast can you get to the Beresford building on Central Park West?
 
In the tower apartment, Shaw finds a woman waiting for him. She’s covered in blood. A body is lying dead on the floor of the luxurious living room.
 
Every book in the apartment’s floor-to-ceiling shelves is by the same author: bestselling true-crime writer Denise Morrow. 
 
"This is you?" Shaw asks the woman. "You're a writer?"
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Only one person knows the ending to this story. Is it the victim or the killer?