Confessions of a Dangerous Fae by Jenna Wolfhart

Every member of the fae royal guard has a unique power, and mine is skill with the blade. So when my queen hears of a new plot against the crown, I’m her top choice to track down the traitor.

Only problem is, our biggest suspect is Lugh, a powerful fae who calls himself the king of the secretive House of Wraiths. But as I grow closer to finding the truth deep within the Edinburgh streets, a strange and dangerous magic draws me to Lugh. When his skin touches mine, I feel alive.
And it makes one thing achingly clear. Lugh might be plotting to destroy my court. But he might also be my mate. The one an old prophecy claims I’m destined to kill.