She Who Holds My Wrath by Shannon V. Velzen (Book #2 | The Fire and Silence Trilogy)
*Please note: this is a pre-order. The book will be released on Aug 28th.
 
Blurb:
 
The anticipated second book of The Fire & Silence Trilogy

The King of Hell is gone, and Daisy Sandoval is left to rule in the ashes.
As war brews across the realms, the Divine Six gather an army forged from forbidden magic and ancient horrors long thought buried.
But grief is changing her.
The girl who once feared the darkness is beginning to command it.
And as the realms edge closer to ruin, and betrayals cut deep, Daisy must decide how much of herself she is willing to sacrifice for revenge.
Only one question remains…

How far can the sun be pushed before it turns cold?