The Four Faces of Nuclear Terrorism , a new book from the Center for Nonproliferation Studies, assesses the motivations and capabilities of terrorist organizations to acquire and use nuclear weapons, to fabricate and and detonate crude nuclear explosives, to strike nuclear power plants and other nuclear facilities, and to build and employ radiological weapons or "dirty bombs."
This is a great book and i'm a little surprised about how revealing it is about things most would've preferred be kept secret to let us all sleep at night.