Mr. Mercedes by Stephen King

It's not often that King writes a straight up thriller, but like everything else, it's something that he excels at.  Mr. Mercedes is a nifty ride with a nice mix of intriguing characters, startling violence, and mystery, and it all comes together in a satisfying climax.  Often, when King offers up such a book, it's a little darker than most similar offerings.  While there are some gruesome bits and some explicit material in Mr. Mercedes, I thought it was gentler than much of King's work.  Having said that, it still has bite, and anyone who picks it up will be turning pages in a frenzy as they get closer and closer to the finale.