This book is on pre-order until restock arrives. 
 
Untethered (Dark Brilliance #1) by Gloria Bottelman:
 
Lux Thorn is seventeen and the sight of warm blood has caused panic since she was eight. It's half the reason she prefers her bodies hours postmortem. With the rare ability to paint the bodies of the dead and bring them back to life, she’s achieved the title of Necromancer in the harsh city of Ghadra. Sequestered between an impassable marsh and a devouring forest, the town is both eerie and merciless. But when bodies are suddenly being piled into carts, marked with a mysterious contagion and fed to the trees, Lux fears her home may finally be rotting.

Torn between the desire to flee or give in to the whispers seeping from the wood, Lux realizes her best chance of survival is an alliance with a dangerous vigilante. One who blames her for the horror plaguing their city, but who also might have the key to its end. Except more than one ruinous force is at work here, and Lux must learn how swiftly revenge can turn corrupt and promises, no matter how enticing, can fall to betrayal.