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 Uniform by Elizabeth Bear, Emma Bull, and Leah Bobet Ligature by Elizabeth Bear - featuring Emma Bull Wireless Girl by Emma Bull and Stephen Shipman and more.