Fearless Duke (League of Dukes #6)
Scarlett Scott

Benedict Manning, Duke of Westmorland, is having the worst week of his life. A bomb has exploded on London Bridge, the Special League is unraveling, and he cannot seem to find a secretary who is not a spineless watering pot. When the prim and proper Miss Hilgrove arrives on his doorstep, calling him everything but a gentleman, he can’t resist toying with her.
Their mutual attempts to teach each other a lesson quickly turn into something more. But danger is in the air, and the brooding duke and the self-avowed spinster are about to become targets of the most lethal menace London has faced…