The White Mountains is the first book of Christopher's Tripods Trilogy. In the second book, The City of Gold and Lead, Will and a friend, Fritz, enter a domed city as slaves in order to explore the alien culture of the Masters. Will finds that Eloise has been killed by the Masters in order to preserve her appearance for a museum exhibit called the "Pyramid of Beauty." Although his mission in the city is not altogether successful—due to carelessness, he is threatened with discovery as a spy—Will does escape the city and provide valuable information to the resistance forces.

In The Pool of Fire, the freedom fighters wage a war against the Masters and manage to regain control of the Earth.

The end of the trilogy is somewhat inconclusive, with Christopher suggesting that the task of establishing peace and understanding among the...