Rule of Wolves- Leigh Barbugo

The wolves are circling and a young king will face his greatest challenge in the explosive finale of the instant #1 New York Times-bestselling King of Scars Duology. 

The Demon King. As Fjerda's massive army prepares to invade, Nikolai Lantsov will summon every bit of his ingenuity and charm - and even the monster within - to win this fight. But a dark threat looms that cannot be defeated by a young king's gift for the impossible.