The Gilded Ones - Namina Forna
Fantastic fantasy YA debut from Namina Forna. Sixteen-year-old Deka lives in Otera, a deeply patriarchal ancient kingdom, where a woman's worth is tied to her purity, and she must bleed to prove it.
But when Deka bleeds gold - the colour of impurity, of a demon - she faces a consequence worse than death. She is saved by a mysterious woman who tells Deka of her true nature: she is an Alaki, a near-immortal with exceptional gifts. The stranger offers her a choice: fight for the Emperor, with others just like her, or be destroyed...
This is quite brutal in parts, but if you love 'Children of Blood and Bone' or 'We Hunt The Flame' you'll love this.