Lightning Strikes Twice (The Heart of a Hero #3)
Jillian Chantal

Laurence Fortescue is not all he seems. On the surface, he’s a lecturer at Oxford with a scientific mind. Hetty’s father admires his work and allows Laurence to use his personal laboratory for experiments. Laurence tolerates the girl hanging around but rarely notices her as he’s wrapped up in his tests.
When she’s struck by lightning recreating Ben Franklin’s experiment and a gentleman she hates is allowed to court her, she turns to Laurence for assistance. Assistance he’s willing to give as that gentleman is someone he suspects is a spy. For France.