The Socialite and the Bodyguard (Harlequin Intrigue Series #1179)

Bodyguard to a dog? Former commando Nash Wilder can't believe he took this assignment, watching over the prized poodle of some spoiled heiress. But with his history, the burly ex-soldier can't turn down a job—and the task of protecting pretty Kayla Landon and her pedigreed pooch was a direct command. But when the threats escalate, and the danger shifts from puppy to owner, Nash's years of combat training kick in. Before long, the rugged bodyguard comes to recognize that the undeniably attractive Kayla has her own kind of strength—and that, to save her, he must risk everything.