Octavia: Or the Trials of a Romantic Novelist — Paula Allardyce

Little did Octavia dream that the lurid novel she penned in secret would become the most sensational scandal of the London season.

She was even less prepared to have her identity as the author revealed, and to be branded as a shocking adventuress. And when the man she loved accused her of using him as the model for her novel's villain, Octavia thought life could hold nothing worse than his cruel accusations.

But that was before she realized that the sophisticated drawing-rooms she had so accurately captured in fiction concealed a smooth-tongued traitor. For England was at war with France, and Octavia had unwittingly revealed more than the foibles of the aristocracy -- she had exposed the treachery of a spy....