White Mountains Trilogy: City of Gold and Lead

Will, Henry, and Beanpole have been living in the White Mountains with the last community of free people on Earth, training to fight against the Tripods. Now there is an opportunity for them to obtain vital information -- every year, young men come from all over to compete in a series of Games, and the winners are taken to the City of the Tripods. Will intends to be one of them. But although many enter the City, no one ever comes out. How will he escape with what he must risk his life to learn?