Undercover Shadow

He'll track her to the ends of the earth to bring her home. She's playing a deadly game that could destroy them both. Their love might be the only truth in a world of lies.

TAG

I've always trusted my instincts in the field, but Nightingale's disappearance has left me grasping at shadows. The others think I'm obsessed, but they don't understand what she means to me. Now, I'm following her trail across Eastern Europe, determined to discover the truth. Was she taken against her will, or has she been working against us all along? I don't care what secrets she's keeping-I'll find her and bring her back, because a life without Leila is unthinkable.

NIGHTINGALE

They think they know me, but no one sees the real me-not even Tag. My disappearance wasn't an accident-it was my only choice after what I discovered in Syria. Now, I'm moving east, with handlers always watching, playing a dangerous game where one wrong move means death. The tunnels beneath the Highland estates hold secrets that could bring down governments. As Tag gets closer, I'm terrified he'll become collateral damage in a war he doesn't even know exists. But if anyone can navigate this labyrinth and survive, it's the man I never meant to love.

While each book in the Protectors Undercover Team One series features one couple and a guaranteed HEA, the series may be more enjoyable read in order.