Este é " Criaturas da Garra " de Douglas Hill.
Finn Ferral, the main character in the novel, is a young hunter in an isolated village at the beginning of the trilogy, but by the time this novel opens, he has crossed most of a continent and has met with many strange events and people. In the course of rescuing his foster father and sister, who were taken by Slavers, he has further honed his already-sharp tracking and survival skills, and he has learned much about the Slavers' operations and machinery.
But many things about them still remain a mystery to be uncovered as events in this novel unfold.
Finn is also a young man of somewhat mysterious origins. His foster father, Joshua, found him as a toddler wandering in the forest. In the previous novel, during a stay at the Slaver base, he found that the raised dots on his arm marked him as a product of the [clone vats?].
A sinopse do livro anterior da série menciona que os recursos da Terra foram esgotados ...
Alien Citadel takes place on Earth, but on a future Earth that only barely resembles our own world. In this future world, humans live in fear, hiding from the Slavers, the planet's new masters. The planet is covered by desert wasteland, forested wilderness, and radioactive firesands where monstrous mutant creatures prowl. There is no more civilization and little hope. The Citadel, built underground in a mountain hideaway, is where the Slavers take those humans whom they spare for use as slave labor: child-bearingage women are used for breeding experiments, and the rest of the captives are used as laborers in the Slavers' mines.
As the novel opens, Finn Ferral has just travelled across a continent strewn with dangers. Slavers run rampant over the planet, scouring the land with heat weapons in their efforts to eliminate any humans and other "vermin" still infesting its farthest reaches.