The Deepest Water — Kate Wilhelm

When Jud Connors, a successful writer, is found murdered in his isolated cabin in the woods of Oregon, his daughter Abby's world starts to fall apart. Who wanted her father dead and why? More puzzling is how anyone could have gotten to the cabin undetected. Was the murderer someone Jud knew?

As Abby embarks on her own investigation, she soon realizes that the clue to the murderer's identity is buried in her father's latest novel, finished just weeks before his death. But will she be able to see through the fiction in time -- before the killer comes after her?