They are the Bad Boys of Brazos Bend—Matthew, Mark, Luke, and John Callahan.

New York Times, USA Today, and Publishers Weekly bestselling author Emily March invites readers to Brazos Bend, the small hometown of the Callahan brothers snuggled deep in the heart of Texas.

DEA agent Luke Callahan has suffered one loss too many and a fishing trip with his brothers is just what his broken spirit needs to heal. What he doesn’t need is a gorgeous stowaway harboring secrets and running from killers. Never mind that he does his best work undercover…

Maddie Kincaid is accustomed to trouble, but she’d hoped to leave it behind when she settled in peaceful Brazos Bend. Who would have guessed that helping a gentle old man would land her in the middle of an attempted murder—her own? Now she’s running for her life—straight into the arms of the infamous Luke Callahan.

Lucky for her, he’s deadlier than the men chasing her. Unfortunately for him, protecting her means breaking a vow he holds dear. When the nights heat up and the secrets start to spill, Luke faces a brand new danger—losing the woman he loves. What’s a mad, bad, and lethal Callahan man gonna do?

LUKE is Book One of Emily March's Callahan Brothers trilogy.