The Pool of Fire

by John Christopher

Published 1 August 1968
Will and a small group of free people plan to destroy the three great cities of the Tripods before the arrival of a space ship destined to doom humanity.

City of Gold and Lead

by John Christopher

Published 1 October 1967
Three boys set out on a secret mission to penetrate the City of the Tripods and learn more about these strange beings that rule the earth.