Lukens, Markauthor : Lukens, MarkLukens, Mark Book SeriesDark Days (Book 4): RefugeDark Days (Book 5): AftermathDark Days (Book 1): CollapseDark Days (Book 6): SurvivorsDark Days | Book 8 | AvalonAncient Enemy Box Set [Books 1-4]Dark Days (Book 3): Exposure:Dark Days | Book 7 | Hell TownA Dark Collection: 12 Scary StoriesAncient Enemy