Rex Rising - Elei's Chronicles, #1

In a world where parasites create new human races, Elei leads a peaceful life as an aircar driver - until a mysterious attack on his boss sends him fleeing with a bullet in his side and the fleet at his heels. Pursued for a secret he does not possess, he has but one thought: to stay alive. Yet his pursuers aren't inclined to sit down and talk, and that's not the end of Elei's troubles. The two powerful parasites inhabiting his body, at a balance until now, choose this moment to bring him down, leaving Elei with no choice but to trust in people he barely knows in a mad race against time.
It won't be long before he realizes he must find out this deadly secret - a secret that might change the fate of his world and everything he has ever known - or die trying.