A man with no memory awakes in the Las Vegas desert and learns that a civilization-busting asteroid will crash in six days. After dying by it, he discovers he is living the same six days over and over. While trying to save the beautiful Cassie, he wonders if he is meant for a greater purpose.
Dark Matter by Blake Crouch;
All You Need Is Kill by Hiroshi Sakurazaka;
The Time Machine by H.G. Wells