The Rogue's Conquest — Lily Maxton

Wallflower Eleanor Townsend is not like most women. She has no interest in marriage, the ton, or fashion. Instead, her heart lies with science. And when the opportunity to present a paper arises, she takes it, even though it means dressing as a man. But her disguise doesn't quite work. Someone notices -- and the brute intends to blackmail her!

Former prizefighter James MacGregor wants to be a gentleman, like the men he trains in his boxing saloon. His first step is gaining a beautiful, wealthy wife. Eleanor Townsend is not that woman, but a chance encounter gives him the leverage he needs. She'll gain him entry to high society and help him with his atrocious manners, and in return, he won't reveal her secret. It's the perfect arrangement. At least until the sparks between them become more than just their personalities clashing. But there's too much at stake for James to give in to his growing attraction.

Each book in the Townsends series is a standalone story that can be enjoyed out of order.