The Black Hawk (Spymaster #4)

He is her enemy.
He is her lover.
He is her only hope.          Someone is stalking French agent Justine DeCabrillac through London's gray streets. Under cover of the rain, the assassin strikes--and Justine staggers to the door of the one man who can save her.  The man she once loved.  The man she hated.  Adrian Hawkhurst.
     Adrian wanted the treacherous beauty known as "Owl" back in his bed, but not wounded and clinging to life. Now, as he helps her heal, the two must learn to trust each other to confront the hidden menace that's trying to kill them--and survive long enough to explore the passion simmering between them once again. Rated '4/5 - Explicit open door' for steam/spice/heat level.