In the vast hinterlands of Caesia, Tylidae, once known as the ruthless assassin the Nightingale, struggles to find acceptance among the anthelai. Despite their dislike of her strangeness and violent past, she offers her help when plague strikes. But Tylidae's kindness is repaid with treachery when a rukh, a creature of myth and legend, makes its appearance on the journey.

The rukh takes her to the Crystal Vale, a place of eternal spring where ether is harvested from the blood of captives. As a halfblood, Tylidae possesses an especially strong ether, making her a valuable prize. With the help of an old ally and a new friend, Tylidae confronts the godlike Stranger, the leader of the Vale's inhabitants, who craves the ether in her blood.

Even if they escape the Vale, Tylidae and her companions will still have to face the bitter winter of the hinterlands and the vengeful leader of the Cunning Ones.

And their victory will carry a terrible cost.

A tale of friendship, redemption, and the cost of kindness, Bones of the Vale is a thrilling fantasy novel with a fierce and determined protagonist that readers won't soon forget.