Summernight

Tamerlan has just five days during the Summernight Festival to save his sister - or she'll be sacrificed to an ancient, long-dead dragon at the height of the Summernight Festival.
¿
Marielle is a Scenter for the City Watch, smelling emotions and spiritual residues and tracking down crimes. When she is assigned to investigate a strange break-in during the Summernight Festival, she will stop at nothing to keep the city safe.
¿
But if Marielle succeeds, Tamerlan will die.

And if Tamerlan succeeds, Marielle will die.
¿
Summernight is the first book in this heart-pounding, grit-your-teeth romp through the wild Festivals of the Dragonblood Plains. If you love fantasy worlds, dragons, and the excitement of holidays turned on their heads, you'll adore Summernight.
¿