Da Koontz - Relentless

Synopsis:
Cubby Grenwich is a best-selling novelist. Cubby has been married for years to a author/illustrator, 
and they have a young son named Milo (nicknamed Spooky) and a dog named Lassie.  They lead an unremarkable, 
unstressful life, until the day a reviewer gives a "snarky, ugly, nasty review" of Cubby's new book.  
Cubby eventually discovers that the reviewer is the "psychopath of all psychopaths" ... and then he 
meets the reviewer's mother.