Conrad Williams 
Sonata of the Dead [EPUB ebook] 

Even as he recovers from his encounter with an unhinged killer, PI Joel Sorrell cannot forget his search for Sarah. He receives a tip that photographs of her have been found at a murder scene, where a young man whom Sarah knew when they were children has been killed. Finding a link between the victim and an writers’ group, Joel follows the thread, but every lead ends in another body. Someone is targeting the group, and it is only a matter of time before Joel’s daughter is run to ground.