The Maze Runner by James Dashner
The Maze Runner #1
 
When the doors of the lift crank open, the only thing Thomas remembers is his first name. But he's not alone. He's surrounded by boys who welcome him to the Glade - a walled encampment at the centre of a bizarre and terrible stone maze. Like Thomas, the Gladers don't know why or how they came to be there - or what's happened to the world outside.
 
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