A Space Opera of Manners and Fast Rockets!

Gerry has the unenviable task of marrying off her once-lover Sora to her half-brother, Reggie. Who is also the king of their colony. Oh, and also no one can know Reggie is her half-brother because of a gaggle of political and secret agendas that would cause Gerry to lose her entire inheritance. In addition, King Reginald is one misstep away from a medical emergency because of his many genetic illnesses. Also a secret.

So what’s a girl to do but to serve as ambassador and wedding coordinator for her secret half-brother, secretly invalid king to procure the galaxy-renown butterfly silks of Estria to make the wedding go off without a hitch? But then disaster strikes Estria just as the negotiations start with a staggeringly attractive representative of the Katagani silk conglomerate, Kalia. Gerry is stuck with only Sora, Kalia, and her skills in rocket racing to make sure the wedding goes as planned and her brother stays in power!

It's The Scarlet Pimpernel in space! Brush off your manners in Romance and the Gentle Art of Rocket Racing by Rena Rocford!