Simply put, this is why Stephen King is the master of his craft.
What we have here are four novellas; The Langoliers which is about an aircraft that finds itself in parallel (sort of) universe; "Secret Window..." which is about an author facing an impossible charge of plagiarism; "The Library Policeman" which about an ancient evil feeding off the fears of others; and it all finishes with "The Sun Dog", which about a photo coming to life (again, sort of).
My favourites were "Langoliers" and "Sun Dog", although that is not to take anything away from the other stories.
I once read a quote attributed to Stephen King, where he claimed to write the fast-food version of stories.
I could not disagree more. Don't get me wrong, this is not Hemmingway or Fitzgerald... but I'm not reading it for that. I'm reading it for fantastical escapism.
The characters have depth and nice (although uncomfortable) back stories. The plot has twists and intrigue, and it difficult to tell you how much I loved "The Sun Dog". As soon as I finished it, I read it again.
There are weak spots. If I am honest, "Secret Window..." did not set the heather on fire. Stephen King has written a number of stories about plagiarism and the fear of accusation. Personally I don't think this story added anything, and the idea of mental voices being made flesh has been explored before (in Skeleton Crew I think).
Equally, "The Library Policeman" reminded me of some cross between "It" and "The Tommyknockers". It was readable, but it was not original.
That said, "The Langoliers" and "The Sun Dog" are worth the cover price alone, and if you want to creep yourself out you could do far worse than this.