Here at last is the eagerly awaited fourth book in David Gerrold's classic and gripping series of alien domination—the story of humanity's courageous struggle for survival against the greatest threat Earth has ever known.

As the tenacious invaders remake Earth's violated surface, transforming its flora and fauna into a replica of their own terrifying home world, a handful of scientists, soldiers, and citizens prepare to fight back—hoping it isn't already too late. In Mexico, a dead Chtorr leads to a stunning discovery about the aliens. At the same time, a military-scientific expedition deep into the heart of the Brazilian jungle uncovers another surprise: a massive hivelike city where the aliens have embarked on the next step in their remorseless campaign to transform humanity.