Every time I try to read a John Saul book, I think, "Why did I bother?" Yet every so often I will pick one up and hope for the best. I need to learn from the past. I couldn't finish this one -- I got about a third of the way through and then just skipped to the end. And I never skip to the end. It was that bad.
You can be a poor to mediocre writer in certain genres: Danielle Steel and Stephenie Meyer immediately come to mind. But in the horror genre, the writing needs to work. It needs to, you know, SCARE you. Creep you out. Create tension.
Not put you to sleep.