I enjoyed reading this book and is un-put-down-able in several places. There is a lot of homage to King's works, especially his short stories and there are sections which are very close to King's writing. 
 Writing overall is good - great even when action part is in play, setting is marvelous and creepy elements are spot on. Its good thriller, characters are messed up yet have an endearing side to them and the plot takes care of the rest. For a fairly decent length novel, it makes a very fast read. However the horror elements lose their element of horror-ness in the third act. It doesn't deliver the punch as it does in first two hundred or so pages. 
 My main grouse is the "children, innocence, evil, overcome evil" theme which has been King's signature and is a dominant and recurring theme in his novels and short stories. Its unfair to compare Hill to his father, King, but writing in the same genre so its inevitable. Hill does get the theme right as expected with an expected ending but the writing is engaging enough to make it through then end. 
 I wouldn't mind reading a companion novel to this piece though. Or a sequel. [Like Doctor Sleep to The Shining. Sorry, couldn't help that :)]