This might have been one of my least favorite King books so far.
The novella is about a man who finds out he needs to cut back on his cholesterol intake, eating fast foods, and becomes determined to loose weight and become healthier. He starts using a stationary bike obsessively. What starts off as simply a way to pass the time, Richard hangs a map on the wall to envision where he is riding, soon turns into something completely different.
The road he begins to envision isn’t imaginary, or at least not as long as his mind if concerned. Feeling that maybe he has overdone the workout, he decides to stop with his doctor’s permission, but something continues to pull him back.