Rule of Wolves by Leigh Bardugo is the second book of her King of Scars duology, continuing the story of Nikolai Lantsov from her earlier Grishaverse novels. Bardugo’s Grisha series has built one of the most popular contemporary fantasy worlds, with the related Six of Crows duology and the Netflix Shadow and Bone adaptation.
For readers in the Grishaverse, this volume is essential.