The Blurb for Trapped

Hello, everyone.  I'm currently tearing my hair out as I try to craft the blurb for Trapped, so I thought it might be fun to see what all of you think.

My four best attempts so far are below-please use the comments section to let me know which is your favorite!

Attempt 1:
Kristin had her future all mapped out.  She just needed to finish off her last two years of high school and then she was almost certain to swap her existence in small-town Idaho for four years at Harvard or Princeton.

Rather than continuing along her carefully planned route, she’s now running for her life from a threat that she couldn’t have even imagined just a few days before. Her pursuer is relentless, and her only hope is the handsome stranger who has managed to keep her alive so far.  Before their flight is over Kristin will find out just how big of a sacrifice is going to be required for them to survive.

Attempt 2:

Ash appeared out of nowhere and saved Kristin from a threat that didn’t belong in her small-town world of classes and test prep.  Their pursuer is a relentless killing machine that Kristin is starting to suspect is unstoppable. Her situation is too bleak to be thinking beyond the next hour, but more and more Kristin finds herself attracted to her mysterious savior.  The more drawn she is to Ash, the more she realizes what each of them is going to have to sacrifice if they are going to have a chance to be together. 

Attempt 3:

Anton is a nearly unstoppable killing machine.  He’s spent the last two hundred years killing whomever he wants, but when he targets Kristin, a small-town teenager, he’s foiled for the first time in decades.

Ash is an exile.  Stronger and faster than any normal human, he’s still forced to keep a low profile to avoid tangling with all of the things out there that are even more dangerous than he is.  He knew Anton was trouble, but he still couldn’t bring himself to let that kind of monster kill her.

Kristin only ever wanted a normal life, college and then a good job in a big city somewhere.  She didn’t count on Ash or the way that she would start to feel about him as they ran for their lives.  They are in too much danger to let emotions get in the way, but neither Ash or Kristin can help the attraction growing between them.

Attempt 4:

Kristin has always been firmly grounded in reality.  Trading in small-town Idaho for an Ivy-League school wasn't going to be an easy proposition and making it happen wasn't going to leave her time for unnecessary things like crushes on boys.

Kristin is about to find out that all of the creatures she thought were nothing more than myth are actually quite real.  One of the worst of them is after her, an unstoppable killing machine that will chase her across a continent.

Kristin is completely out of her depth.  Her one hope is a mysterious guy with dangerous skills and a dark past.  He's the kind of guy that Kristin knows she shouldn't get involved with, but as their attraction grows it becomes apparent that being with him is going to require an even bigger sacrifice than she realized.