Stephen King is a favorite writer of mine. Because his books are so dense in internal thoughts and description they tend not to transfer well to film imo. He had a collection of short stories called "Night Shift" which contains the story "Last Rung on the Ladder" which doesn't have any supernatural elements and for me is the most powerful story he ever wrote.

As far as film adaptations "The Mist" was pretty good despite some key changes. I know that King was not crazy about Kubrick's version of "The Shining". But I still like it because I think Kubrick captured the isolation perfectly. The first adaptation of "Salem's Lot" with David Soul and James Mason was worthwhile.

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.