Knightmaster by Anna Hackett

She was sent to forge an alliance with the deadly Oronis knights…and instead finds herself framed for abducting their queen.

Xenoanthropologist Kennedy Black loves exploring new cultures with Space Corps. Everyone in her life has left her, so she happily fills the void with exciting adventures. When she’s assigned to escort the new ambassador to the planet Oron for an opulent ball, she’s thrilled to get an up-close look at the Oronis knights, and their culture of honor and duty to their knightqueen. But she never expected her reaction to cool, controlled Knightmaster Ashtin Caydor, head of the Oronis Knightforce.
And she really didn’t expect a savage alien attack that leaves the knightqueen missing and Earth fingered as the culprit.
Knightmaster Ashtin Caydor lives to protect his planet, his people, and his knightqueen. He came from nothing, and the code of knighthood is the cornerstone of his being. When Knightqueen Carys is abducted by their mortal enemies, the ferocious Gek’Dragar, he’s icily enraged, especially when he finds evidence that Earth, and the far too enticing Sub-Captain Kennedy Black, are involved.
But Kennedy vows to clear Earth’s name by helping Ashtin and his knights find the queen. As she and Ashtin embark on a risky mission to a dangerous jungle planet, they’re forced to rely on each other, and their sizzling chemistry is soon undeniable. But love can’t be an option, not for a knight bound only to his duty and a woman whose heart already has too many scars.