Iceborn (Seaborn Cycle #2) by Michael Livingston

In the thrilling sequel to Seaborn, the Windborn threaten war against the Fair Isles – and three women of the sea hatch daring plans to change their fates.

Bela, the reluctant hero, journeys into the inhospitable Sea of Ice in search of the ancient portal that broke the world.

Shae, the ship-less Bone Pirate, stands with a Windborn exile before an army of remorseless metal beings.
And Alira, the huntress, faces the revelation of what the Bloodborn are, and the truth of their horrible magicks.

In desperation, in determination, and in hope, every step they take reveals new secrets about their past – and new fears for their future.