If Gail knew Uncle Perkins' stories were true, she wouldn't have taken her friends up that mountain. The plan was simple. Hike, camp, and ride the zipline back down the mountain. But Uncle Perkins' stories are true, and the horrors are real. Now the simple plan is the only plan they have to get off that mountain or disappear, remaining there forever. Zipline is an immediately gripping, fast-paced, unique story...