Stephen King's latest novel started with a single question: A killer for hire is on a high floor of a building, poised to shoot a victim; now, how does he get out? The answer to that conundrum occupies much of Billy Summers (out August 3). 

A nerve-rending thriller rather than a nightmare-inducing tale of terror, the book still offers plenty to delight the Master of the Macabre's army of fans. 

HERE, King, 73, offers a peek inside.