The Duke and the Assassin

An M16 agent falling for the wrong woman.
A Russian with secrets to hide.
And the passion that defies the rules...
THE DUKE
My team. My family. My allegiance. As a duke, the boundaries and loyalties are clear. I may be the Marquess of Wells with a stoic and rigid father on his deathbed, but I have desires and needs that break those boundaries. Falling for an assassin may be an issue. But I haven't faced a problem yet that I can't solve-other than assembling a crib.

THE ASSASSIN
Secrets. Lies. Deception. As a Russian assassin, I'm riddled with it all. Now, with a ten-million-dollar bounty on my head, there's no way I can get out alive. But the irresistible and incorrigible duke thinks otherwise. He wants me in his life, in his arms, and in his bed. There's no declining the desires of a duke. And quite frankly, I have no intention of denying him anything.

While each book in the Royal Agents of MI6 series is a standalone with its own HEA, they may be more enjoyable read in order.