The Ambassador's Daughter — Lynn Lorenz

For ex-Marine Brett Butler, following in her father's military footsteps had been easy. But when she's called to take her mother's place as her father's social secretary on New Commonwealth, she finds her mother's high heels much harder to fill. Fitting in isn't Brett's strong suit, but if she's to make a new life for herself with her ambassador father among New Commonwealth's aristocracy, ball gowns and courtly manners will be her highest priority. Especially if she wants to fit in with the dashing Lord Stephen Brandon. That is, until intrigue, danger, and weapons of mass destruction get in the way...