Looking for the name of a series of novels I read a two or three years ago. I think the books where relatively new (no older then 10-15 years) as the tech in the books where not outdated scifi.
The series was at least 3 books, but I think there may have been more.
A brutal species of alien determined to be the quickest, strongest, most brutal... individuals possible, takes a group of humans from their colony ship(?) and places them on the aliens "sacred" planet. "Sacred" because of the local fauna being the only threat the aliens have found in the galaxy that surpasses their own prowess.
After a period of time the aliens leave and forget about the weak humans, thinking they will die anyways. The humans do not die, but instead take genes and inspiration from the local fauna (carbon nano tube bones, superhuman reactions, speed, strength and so on).
Think one of the books are named the same as the aliens named the planet.