Beyond Time by Lee McCormick

How many times will we kill each other? How many times can we fall in love?

SETH
I always thought my world would begin and end with Jayce Walker. When a sleep study offers us life-changing money, we jump at the opportunity. There’s only one problem: I don’t have insomnia. Bluffing my way in is easy, but getting there and losing everything that’s ever mattered is a nightmare I can’t escape.
Jayce is gone. My only ally is a voice in my head named Clay, who insists the body walking around — the one I’ve known and loved my entire life — belongs to a man named Kade, and he only wants one thing.
To kill me.

KADE
Most people don’t get second chances, but I did. Brought back to life by a power-hungry company, I have one thought: I want revenge.
But… the man I’m chasing isn’t Clay. His name is Seth, and all my years of being a heartless, psychopathic killer never prepared me for the way his wide eyes make me feel. I don’t know how to deal with the emotions still knocking around in my chest that used to belong to someone named Jayce.
They make me question things. They make me wonder if my agenda has changed…
I want to make Seth mine.