Among the many short stories penned by award-winning author Poul Anderson (1926-2001) are a series of stories about Steven Matuchek (a werewolf), and Virginia Graylock (a witch), who inhabit an Earth where magic is studied and employed just like any other technology. In 1971, these four short stories were combined into one book - Operation Chaos. In Operation Afreet (first published in 1956), Steven and Virginia meet during the great war against the Saracen Caliphate, when they are sent on a commando operation to stop the enemy's use of a powerful monster. In Operation Salamander (1957), Steven and Virginia must team up to stop a rampaging fire creature, before it can burn down the whole town. Operation Incubus (1959) pits newlyweds Steven and Virginia against a demon that is determined to put a stop to them...permanently.