Basalt by Suzanne Roslyn

He’s a dragon-blooded soldier on a mission, and she’s the one who holds the contract for keeping peace between the desert dragons.

Fintan Basalt and his team of soldiers infiltrate a group of bride hunters to take down the barbaric practice of stealing brides. Amongst the brides, Basalt finds one he desires above the rest, but her contract is already signed.
Talora sold herself as a bride to a dragon shifter to secure three meals a day. Crossing the desert to get to her groom is the least of her worries when she encounters a dragon-blooded man who causes her to think twice about her arranged marriage.
Time is running out. A storm is brewing. How will either of them fulfill their duties?