The Maze Runner - James Dashner

When the lift cranks open, the only thing Thomas remembers is his first name. But he’s not alone – an army of boys welcomes him to the Glade, an encampment at the centre of a terrible maze. The Gladers have no idea why they’re there, or what’s happened to the world outside. And following the arrival of a girl with a message, they must find a way our – or die.