Publisher blurb: Wisely did Ibn Schacabao say, that happy is the tomb where no wizard hath lain, happy the town at night whose wizards are all ashes, and happy the line manager whose wizards hath filled in their timesheets for this Sabbat-night. The Laundry – that top-secret, bottom-drawer branch of British espionage – was founded to ensure that magic is kept under control, and that no-one summons the Great Old Ones ahead of schedule. The best way to fight magic is with more magic, which is exactly like fighting fire by hitting it with a molotov cocktail. Health and Safety can't help you now... License to Summon explores the dark side of Computational Demonology and arcane science within the Laundry, as well as the magic of other agencies... and other entities. New spells, new gadgets, new ways to end the world! License to Summon - like fighting fire by hitting it with a molotov cocktail!