Labyrinth of Lies and Sacrifice by C. F. E. Black

Madness comes to all who enter the Labyrinth.

All Vera wants is to survive her wedding day and fade into the rhythms of a normal life, no easy task for a quarter-mage like her. But her worst fears come to pass when her faulty magic once again lets her down—only this time, she’s branded a criminal.
Tossed into the kingdom’s enchanted prison known as the Labyrinth, Vera must keep her wits about her as she navigates this deadly place full of monsters and a wicked force that feeds on fear.
When she encounters another mortal trapped within, she doesn’t know if she can trust him. But as their paths continue to cross, it seems as if the maze is forcing them to work together. Can they help each other defeat the monsters and survive in this nightmare world? Or is the Labyrinth deceiving them all?