To pen name or not to pen name-- my question to you

I have this book I've written. I would describe it as a contemporary action thriller with a dash of romance. It's probably also "New Adult", meaning ages 18-26, because it's about a college student. Since it's so different from what I've published so far, I was thinking of publishing it under a pen name. But I also know I have readers looking for more, and I think they might like this. Since my cover designer left me in the lurch, I've been given the opportunity to start from scratch, and now I'm rethinking using a pen name.

Here's a peek at what I was working on for this book called Driven.

What do you think? Would you mind if I wrote in multiple genres?