Scott Sigler is an American author known for science fiction and horror books, such as Nocturnal, Ancestor, Infected and Contagious.Scott Sigler is an American author known for science fiction and horror books, such as Nocturnal, Ancestor, Infected and Contagious.Scott Sigler is an American author known for science fiction and horror books, such as Nocturnal, Ancestor, Infected and Contagious.