The Assassin and the Underworld (Throne of Glass)

The Assassin and the Underworld (Throne of Glass) - Sarah J. Maas Strong, Stubborn and Impulsive with a good sense or right or wrong – that is how Celaena Sardothien is.

In guise of helping get rid of slave trade in the kingdom Celaena is given a job - to assassinate the man facilitating the trade. But Celaena doesn't like what she sees and is cheated by her own master....

Loved it!