For the Love of the Baron (The Noble Hearts #3)
Callie Hutton

Jonathan, Lord Stanley, belongs to the same elite book club as Lady Marigold, who annoys him to no end. In his esteemed opinion, she is nothing more than a nonsensical chit who doesn't deserve membership in their exclusive club.
When they both attempt to buy the same journal of a deceased member, a man well-respected in the science community, a tug of war begins. The battle for the book throws them into danger—and passion. Something neither of them expected.