Beyond Reason by Lee McCormick

Sometimes the hardest thing is being the only one left alive.
Axel Fetterman: The Cleaner
Twenty-two years ago, my world ended. I was called to a scene to find the man I loved, cold and lifeless, on the ground. Every moment between now and then has been nothing more than existing between one breath and the next while dealing with the grief of losing the one person I couldn’t live without.
When a man shows up at my door telling me he’s Xavier, I don’t know what to believe. On one hand, it’s impossible—on the other, I’ve never met another person who makes me burn the way he does. Is believing in the impossible too good to be true?
Xavier Benham: The Killer For Hire
Twenty-two years ago, I died. I don’t know how, and I don’t know why, but I’m alive again. Whatever screwed-up experiment brought me here, I won’t waste the opportunity. I can’t remember most of my life. I can’t remember much, but I can remember him.
Axel.
I’ll do whatever I have to if it means getting back to him, and whatever it takes to become the man I used to be. The only thing standing in my way is the company that brought me back and their determination to rectify their mistake.