Hannah’s Truth by Regan Black

What happened in Vegas may be the key to surviving a powerful enemy. . .
After his Army career cost him his marriage, Karl Bartholomew swore off commitment and started a new life in Virginia. But when Bart finds one of his employees murdered and all signs point to the cartel, he knows he needs backup.
Calling in a favor from his old Army pals at Cypress Security is a no-brainer, but Bart is as shocked as anyone to find that part of his cover is marriage to the one woman he can’t forget.
DEA Special Agent Hannah Thalberg knows every case has its risks. After her witness is brutally murdered, she refuses to give up her investigation. A Vegas wedding to Bart is the perfect cover. . . and the perfect temptation.
As Bart and Hannah fight to uncover the secrets of their shared enemy, they can’t resist the desire flaring between them. To survive, they’ll have to trust each other—and their hearts.