"What does a young lady like you know about steam engines?"
"Snickers and rude noises erupted in its wake from throughout the co-called genteel membership."
Here is the Goodreads summary:
Engineer Winifred "Wink" Hadrian has been in love with Inspector Liam McCullough for years, but is beginning to lose hope when he swears to be a lifelong bachelor. Faced with a proposal from a Knight of the Round Table and one of her closest friends, Wink reluctantly agrees to consider him instead.
Because of his dark werewolf past, Liam tries to keep his distance, but can't say no when Wink asks him to help find her friend's missing son. They soon discover that London's poorest are disappearing at an alarming rate, after encounters with mysterious "mechanical" men. Even more alarming is the connection the missing people may have with a conspiracy against the Queen.
Fighting against time—and their escalating feelings for each other—Wink and Liam must work together to find the missing people and save the monarchy before it's too late.