Claimed By the Guardian by Kathy Lyons

She hunts for answers in blood. He protects secrets in fur.

Dr. Cecilia Lu is drowning in Detroit’s nightmare. The “flu” is transforming people into monsters, and every test, every sleepless night brings her closer to a truth that shouldn’t exist. Then Hank Coleman walks in with blood on his hands and a touch that feels like home.

Former Army medic Hank Coleman knows exactly what’s turning Detroit inside out: poison in the water that makes shifters go feral. Now the woman he can’t stop thinking about is searching for answers that will expose everything. Keeping her safe means keeping her in the dark—even as every instinct screams she’s his.
When Cecilia discovers shifters are real, the conspiracy explodes. A mad scientist wants her research. Hank’s cover is blown. And the brilliant doctor who trusted him now knows he’s been lying about everything—including what she means to him.

She needs the truth. He needs her alive.
Together they’ll burn down the lies—if the betrayal doesn’t destroy them first.