What has the author Kaz written?

You're likely thinking of Leigh Bardugo, who writes under the pen name Kaz.

Leigh Bardugo has written several popular books, including:

* The Shadow and Bone Trilogy:

* Shadow and Bone

* Siege and Storm

* Ruin and Rising

* Six of Crows Duology:

* Six of Crows

* Crooked Kingdom

* King of Scars Duology:

* King of Scars

* Rule of Wolves

* The Grishaverse: A collection of short stories and novellas set in the same world as her other books.

* The Ninth House: A standalone novel about secret societies at Yale University.

She has also written several other books for young adults and children, and is currently working on a new trilogy.

If you're looking for a specific title, please let me know!