Halcyon

Trained as a killer, Mirin had let herself believe she'd never need her dagger again. Just be what she seemed, a mild-mannered young wife.

But when everything is taken from her--the man she loves, the quiet life she's worked for, her child, her very identity--she knows she has to fight for what's hers, with the weapons she knows best: The mysterious power of her music. The aid of the fisher bird, the bird called halcyon, harbinger of her god.

And her dagger. 

5-star reviewed fantasy novel