King of Scars is part of the vivid and beautiful Grishaverse created by Leigh Bardugo. She combines characters from Shadow and Bone as well as Six of Crows and the result is fantastic. The story seamlessly connects to so many existing elements established across the Grishaverse and it enhances the impact of this book so much more. Needless to say, you should read the Shadow and Bone Trilogy as well as the Six of Crows Duology before getting to King of Scars. ...