Feathertide by Beth Cartwright

A girl.
A secret.
A life-changing journey.

Born covered in the feathers of a bird, and kept hidden in a crumbling house full of secrets, Marea has always known she was different, but never known why. And so to find answers, she goes in search of the father she has never met.

The hunt leads her to the City of Murmurs, a place of mermaids and mystery, where jars of swirling mist are carried through the streets by the broken-hearted.

And Marea will never forget what she learns there