The Deathworld Trilogy Author:Harry Harrison On Pyrrus, colonists have fought a centuries-old war with native life forms which adapt to human tactics & technology, evolving new species so rapidly that natives returning from even brief trips offplanet must be carried in protective armor canisters from their ship to safe buildings, where they learn of the latest threats. The 1st three storie... more »s were initially published as serials in Analog Magazine under the names given:
Deathworld-1960: Jason dinAlt, interplanetary gambler with some psionic ability, is hired to rapidly multiply the Pyrrans' cash, so they can buy new weapons & raw materials. Having won big, he must flee with the Pyrrans & learns not only to survive on their planet, but also the secret behind the evolutionary war--& that's just the 1st half of the book...
Deathworld 2-1964 (1st published in the UK as The Ethical Engineer): dinAlt, kidnapped by a religious fanatic, finds himself shipwrecked with the fanatic on a world which has a mixed bag of technological levels not including spaceflight.
Deathworld 3-1968 (1st published as The Horse Barbarians): The Pyrrans field a taskforce to another planet, going undercover to help stabilize it in the face of violent, nomadic raiders.
The Deathworld Trilogy ('74, omnibus of Deathworld, Deathworld 2 & Deathworld 3.=The Deathworld Omnibus).« less