The second book in the Maze Runner series:
"Solving the Maze was supposed to be the end..."
After escaping the Maze, the last thing Thomas and his friends expected to see was the barren wasteland that greeted them. Earth has been ravaged by a terrible event that resulted in the spread of a deadly, violent disease called the Flare, and few humans remain alive to tell the tale. Thomas must journey across the Scorch to once again save himself and his friends, coming across new allies and enemies along the way.
James Dashner - The Scorch Trials