Leigh Bardugo - Siege and Storm - Ostrom and vihar

"Darkness never dies.

Fleeing across the True Sea, haunted by the ghosts of those killed in the Zone, Alina starts a new life with Mal in an unknown land while trying to keep her being a sun summoner a secret. But he cannot leave his past or his destiny behind him for a long time.
The Nightmare has left the Shadow Zone with a terrifying new power and is plotting a dangerous plan that will test the limits of the natural world to the limit. With the help of a notorious pirate, Alina returns to her beloved country to resolutely confront the forces that are attacking Ravka. But as her power grows, Alina sinks deeper and deeper into forbidden magic and the Night's Game, and grows further and further away from Mal. He must choose between his country, power, and the love he always believed ruled, or risk losing everything in the coming storm."