Silver Bounty - The Royal Rose Chronicles, #2

NEVER TRUST A PIRATE Emme is tasked with getting rid of the king, but kings are not an easy target, and this one is bent on purging his lands of pirates. As Emme's job becomes increasingly dangerous, she learns to survive the pirate way-cunning and merciless-while consoling herself with one fact: she's just doing what it takes to get home. But when Emme mistakenly takes out the wrong man, not even the protective pirate captain can save her from the consequences.
In a string of betrayals, one thing is certain. You can never trust a pirate.