Windfall by Shawna Barnett

Captain Liana Foley knows a thing or two about fights. She fights the King’s Navy. She fights to balance power in oppressive Vioria. She fights for respect as a female, bisexual, pirate captain. But she’s losing her biggest fight: to escape her secret past as a lost Princess.

With a mysterious letter and a stranger threatening to expose her, Liana is blackmailed into attending a royal ball and protecting her counterpart, sheltered Princess Rhian. The pretenses are suspicious enough, but Liana takes the risk in hopes to finally unveil the magic plot that killed her parents and forced her into hiding… Read more.