Undercover Daddy (Harlequin Intrigue #990)

All federal agent Luke Buchanan wanted was his son. That and revenge against everyone involved in the illegal adoption that had resulted in his baby boy being stolen from him. So when he finally tracked down the woman who'd been raising Christopher as her own, he was hell-bent on making her pay.

But Luke wasn't the only one after Elaina McLemore. Someone was hunting her, following her every move. And from the moment he saw the fear in Elaina's eyes, he vowed to protect her—and the baby …