The Maze Runner - Dashner, James. Lexile 770

Great book! This is the first in a three part series. Review from School Library Journal
Grade 6–10—Thomas wakes up in an elevator, remembering nothing but his own name. He emerges into a world of about 60 teen boys who have learned to survive in a completely enclosed environment, subsisting on their own agriculture and supplies from below. A new boy arrives every 30 days. The original group has been in "the glade" for two years, trying to find a way to escape through a maze that surrounds their living space. They have begun to give up hope. Then a comatose girl arrives with a strange note, and their world begins to change. There are some great, fast-paced action scenes, particularly those involving the nightmarish Grievers who plague the boys. Thomas is a likable protagonist who uses the information available to him and his relationships (including his ties to the girl, Teresa) to lead the Gladers.