From A Buick 8 is the most recent Stephen King novel (as of this writing anyway), in which King relates a story of a portal between this dimension and some other. The story describes a division of the Pennsylvania State Patrol's self-determined task to guard the portal, both from inadvertant entry and from entities that exit it.
This book wasn't what I would consider to be one of Stephen King's best, but it wasn't terribly bad either. It definitely wasn't a repeat of Christine, which is what I feared it would become when I first started reading it. I was actually fairly pleased with it and did read most of it in a day (so, it was enough to at least keep my attention barring interruptions from letting the dog in and out).