Badge of Honor (In the Line of Fire Book 2)

Why is experienced FBI agent Sarah Roberts starting over as a small-town beat cop? She has to be working undercover. Stuck with the job of training her, police officer Nick Matthews knows exactly who Sarah is spying on: him. If he ever wants to live down his past, he'll train her well, but won't say one word beyond the manual. Yet it is Sarah's past that comes crashing down on them. And trusting his new partner becomes a matter of life and death--and love.