Throne of Glass by Sarah J Maas
“After serving out a year of hard labor in the salt mines of Endovier for her crimes, 18-year-old assassin Celaena Sardothien is dragged before the Crown Prince. Prince Dorian offers her her freedom on one condition: she must act as his champion in a competition to find a new royal assassin.”
While Celaena begins training for the competition with the Captain of the Guard, Chaol Westfall, something darker lurks within the castle walls. As her competitors begin to suddenly die one by one, she quickly comes to realize that her destiny is much greater than a renowned criminal assassin such as herself could have ever thought. Just who is behind all of the killings? Will she be able to find out before she, too, falls victim and is stripped of the chance to be free? Readers will be propelled into an action-packed world full of mystery and intrigue that does not disappoint.