New Yorker Nicholas White was trapped in an elevator for 41 hours. How did it happen? How do elevators work? Are they safe? Why are so many people afraid of them? Across North America, elevators move 325 million passengers every day, most of the time without problems. But will the elevator-wary be comfortable handing over the reins to computers? Once brawny but simple machines, elevators are now getting a brainy makeover and reaching new heights. "Trapped in an Elevator" reveals the secrets of these ubiquitous machines and investigates personal stories of those who have been caught inside when they do fail.