Season of Fear by Emily Cooper

18-year-old Ilse Odenwald dreams of being afraid.

In her village, fearfulness is next to godliness. The women of the village feed their terror to an ancient Saint. In return, it protects them from the monsters of the Hexenwald—the horror-filled forest on their doorstep. Born unfearing, Ilse has felt like an outsider all her life. When the Saint discovers Ilse's divergence, it levels a threat. She must find her fear, or it will devour her sister.