A pretty good fantasy novel that's not too way out there. Some of the people of this land are blessed with a special skill - called a Grace. These take many forms and are announced by having different coloured eyes. Katsa is blessed with the killing Grace & is used as a sort of lightweight heavy by the thuggish local king. But she's come to the conclusion that killing isn't actually what she wants to do, and so sets out to use her skills to make life better - not worse, for the people she encounters. And she encounters some rather interesting people in this endeavour. And discovers more about herself, her skills and how to use them. Nicely presented and entirely believable representation of a society where individuals with a skill are not always made welcome. There's a sequel, which I'm going to look out.