In this issue: COMMENT "Don't Look Back", by Steve Coll: Pakistan and the Taliban. THE TALK OF THE TOWN "Squidding", by Dana Goodyear: Southern California's squid invasion. LIFE AND LETTERS "The Deflationist", by Larissa MacFarquhar: New York Times Op-Ed columnist Paul Krugman. ANNALS OF GASTRONOMY "Where's Chang?", by Calvin Trillin: The chef who can't shake his followers. THE CURRENT CINEMA "Behind Bars", by Anthony Lane: Reviews of Shutter Island and A Prophet.