This book is on pre-order until book delivery arrives.
 
Veil of Embers (Threadfire #1) by Karlia Molina:
 
Eadartha is rotting from the inside out.

Sorcha is a druid ranger sworn to guard the Veil, the shifting boundary that protects her realm from the creatures that lurk beyond it. When a cloaked figure whispers her name, the Veil begins to tear. Monsters slip through the cracks, spirits stalk the woods, ancient gods stir awake, and Sorcha’s runes flare with a power she never wanted.

The Druid Council offers no answers. The forests offer only warnings. And the Dark Druid’s shadow grows stronger with every passing night.

With Samhain approaching and the realm unraveling, Sorcha begins to search for truth hidden in forbidden magic and forgotten myths. Loyal Kyron stands at her side, and a chaotic Cait Sídhe guides her through riddles, lore, and half-truths. Every path leads her closer to the one place no one dares to go.

At the edge of the Veil, one choice enter the unknown or lose everything she swore to protect.