Contender: The Challenger

In a world far from our own, where enemies come in many forms, the ultimate battle for survival continues ... The stakes are higher than ever in The Challenger, the second book in the epic new trilogy from the bestselling author of the Summoner series.
CADE CARTER HAS BEEN CHOSEN
In a realm of monsters and warriors, Cade is an unwilling contender in a deadly tournament controlled by the brutal alien overlord Abaddon.
Cade may have won the first round but the fight isnt over yet. For his next battle he must duel a seven-foot-tall, clawed monster - the reigning champion of an alien race.
LOSING WILL LEAD TO EARTHS DESTRUCTION
Desperate for anything that may give him an advantage, Cade sets off on an expedition into the jungle to scavenge weaponry to help him win. But there he is captured by gladiators, and before he knows it he finds himself participating in a deadly new game where the prize is his freedom.
ROUND TWO IS ABOUT TO BEGIN ...