The Thief and the Traitor Bride by V. L. Bovalino

A ruthless spy. A deadly mission. A thief who could ruin it all.

Nore Gordon is a woman of many talents: she can speak a variety of languages, disguise herself in plain sight, and has made a name for herself as a successful wine merchant. But unbeknownst to those closest to her, it is all a front for Nore's true role as the favoured spy of the Lindle crown.

Tasked with infiltrating enemy lands in search of a powerful relic, Nore is forced to engage the services of a great thief. Unfortunately, the only person for the job is her estranged husband Caspian. Both Nore and Caspian bear the scars of the disastrous end of their marriage, but if they are to survive their deadly new assignment, they must pose as a happily married couple to avoid detection.

As danger closes in, Nore finds herself tangled in a web of lies and deceit-and though Caspian is at the centre of it all, she may not hate him as much as she once did. But Caspian has betrayed her before, and trust can be far more deadly than deception.