Craig Gaydas 
Reborn [EPUB ebook] 

Mankind faced extinction centuries ago, but with the help of the intergalactic Consortium they were rescued from the brink of destruction. This time, Nathan Chambers will have to fight a war on two fronts if he hopes to prevent their demise.
The conflict will test the endurance of his friendships, the strength of his body and the toughness of his character, and he will need to shed his naive teenage persona and be reborn as the defender his allies desperately need.
Reborn introduces the Twelve Timeless – ancient survivors of a universal catastrophe – who pledge their help to Nathan’s cause. But will their assistance be enough to prevent history from repeating itself?