In Too Deep by Kimberly Kincaid

As Station Seventeen’s rookie, Luke Slater knows his fire and EMS training will be both rigorous and risky, but he never imagined having to partner up with the one woman he wants to keep at arm’s length most of all. Quinn Copeland is as wide-open as Luke is reserved. He has no interest in letting the sweet and sexy paramedic rock his hard-earned control. But the need for composure becomes the need to survive when they find themselves in the crosshairs of a brutal gang leader on their first shift together.

Paramedic Quinn Copeland’s station mates aren’t just her friends. They’re her family. She’d do anything to keep them safe—including reluctantly trusting her impossible-to-read, impossibly gorgeous new partner with the one thing she holds close. As the passion between Luke and Quinn goes from a slow burn to a sizzle, their steps grow more and more dangerous, both in the fire house and out. Can they outwit a cold-blooded killer and face the fears that could cost them everything? Or are they in too deep?