He's her best friend's older brother. Brooding, bossy, and totally off limits. But all rules are off when she moves in as his roommate.

Oliver Flynn is putting his life back together. Sobriety, check. Great job, check. Living with his kid sister's smoking hot best friend... that might be a problem.

When Luna Locke needs a place to crash, she goes straight to her BFF's house... and walks in on her BFF's older brother Oliver enjoying his alone time. It's no big deal. It's not like she's going to die of embarrassment. So what if she thinks about mounting him every time he groans over his morning coffee?

It's not happening. Oliver is all kinds of difficult. Bossy. Brooding. Sweet in the dirtiest way possible.

Kissing him is against the rules. Touching him is totally off limits. Falling in love is out of the question.

But some rules are made to be broken.

The Rule Breaker is a standalone best friend's brother romance with a feisty college student heroine, a brooding tattoo artist hero, and enough heat to melt your Kindle. Come see why readers say "no one writes broken bad boys like Crystal Kaswell."