Deathworld 1

The planet was called Pyrrus...a strange place where all the beasts, plants and natural elements were designed for one specific purpose: to destroy man.The settlers there were supermen...twice as strong as ordinary men and with milli-second reflexes. They had to be. For their business was murder...It was up to Jason dinAlt, interplanetary gambler, to discover why Pyrrus had become so hostile during man's brief habitation...