Deceiving The Duke

Well-mannered women don't have careers in 1806 so Philomena St. Gobain
disguises herself as a man to attend the Society for the Advancement of
Science meetings where she sells her inventions to a select, chosen few.
The handsome Duke of Tenwick is not one of those chosen few, so when he
corners Phil in the hallway during a clandestine meeting with one of
her suppliers, she slips away as quickly as she can. Since she and the
Duke have never been introduced and rarely travel in the same circles,
Phil is hardly worried about him guessing her true identity ... until he
shows up two days later at the ball she is holding with the missing
piece from one of her most coveted inventions in his hand.
Morgan
Graylocke, the tenth Duke of Tenwick, takes the spy business seriously.
Normally relegated to desk work, his brother's recent marriage has
given him an opportunity to work in the field. He never imagined his
first assignment would throw him in the path of someone as beautiful
and intriguing as Philomena St. Gobain. But his delight soon turns to
trepidation as he realizes it may not be a coincidence that Phil shows
up at all the same locations where Morgan is sent to catch the traitor
who is passing off information to the French. Is it possible the woman
he is falling for is the very spy he is looking to capture?