In spite of his inexperience, Ben's teacher asks him to help out with the orienteering club. By October, the team is heading up a mountain for their first trip. Four days later, a few hike out. Some of them never will. And at least one of them is Ben's fault. 
 This isn't a tense, creepy thriller, but it's a thriller nonetheless. Some of it is teens being teens, but also teens being people with conflicting desires and needs and issues. Teens weighing their own desires against what they believe is love, or help, or codependency. 
 Worth a read, especially for fans of Into Thin Air or other mountain-survival stories.