Boys come to the Glade via an empty freight elevator with no memory of how they got there or of their prior lives. This disorientation is made more frightening when they realize that to survive they must lock themselves in every night to avoid the horrors of the Grievers, beings that are part machine, part animal—and altogether deadly. The boys in the Glade send out Runners each day to find a way out through the Maze that surrounds their one patch of safety, with no success. Life goes on until one day the elevator delivers a girl. She brings a message: She is the last child to be sent, and there will be no more deliveries of food or supplies. Now the Glade is cut off, and as the Grievers gather for an all-out attack it’s clear that it’s now or never—the Maze must be solved. (Kirkus Review).