Taken (Taken, 1)

Fans of Incarceron by Catherine Fisher and Variant by Robison Wells won't want to miss this magnetic first book in a gripping dystopian sci-fi series. Marie Lu, New York Times bestselling author of the Legend trilogy, raves that Taken is "an action-packed thrill ride from beginning to end. More, please!"
Gray Weathersby has grown up expecting to disappear at midnight on his eighteenth birthday. They call it the Heist—and it happens to every boy in Claysoot. His only chance at escape is to climb the Wall that surrounds Claysoot. A climb no one has ever survived . . .