The Warded Man: Book One of The Demon Cycle

After sunset, corelings—demons with supernatural powers and a consuming hatred of humanity—rise from darkness. For centuries, these creatures have terrorized the night, gradually reducing human populations who shelter behind magical wards. These symbols of power originated in myth, and their protection is fragile and uncertain. Humanity was not always so vulnerable. In the past, men and women fought corelings as equals, but those days have ended. Each night the demons grow stronger while human numbers decline under their relentless attacks. As hope diminishes, three young survivors of demon attacks decide to venture beyond the failing safety of the wards. They undertake a desperate quest to recover lost knowledge from the past, standing together against the night.