When Aisling is chosen by lottery to hold Samhain Vigil in the woods outside her hometown, she couldn't have imagined how completely her life would change. Attacked by the Faerie Horde? Undesirable, but a known risk. Claimed by the Four Horsemen of Faerie while at Death's door? Impossible. And yet, the possibility that had never even crossed Aisling's radar promises to make Samhain explosive. Trick or treat? Vigil was originally published under Mariah Thayer as part of the Booktober 2022 PNR Charity Anthology collection. It contains graphic content and as such is unsuitable for readers under 18.