The FBI's Behavioral Analysis Unit hunts humanity's worst nightmares. But there are nightmares humanity doesn't dream are real. The BAU sends those cases down the hall. Welcome to Shadow Unit. The Shadow Unit series was created by award-winning authors Emma Bull and Elizabeth Bear. Contains three novellas: “Ballistic” by Sarah Monette, Emma Bull, Elizabeth Bear & Amanda Downum “Endgames” by Emma Bull “Overkill” by Elizabeth Bear plus bonus material.