Christian Seaton: Duke of Danger (Dangerous Dukes Book 6)

The declaration: "You don't have a choice. You will return with me to England." 

The deed: In the dark of night, British spy Christian Seaton, Duke of Sutherland, abducts Lisette Duprée and flees French mercenaries in a race against time. Christian must protect her at all costs—Lisette is the answer to everything in the Dangerous Dukes' work for the crown. 

The difficulty: Innocent Lisette is an enticing temptation who's increasingly hard to resist!