"Nuclear Reductions (A Technically Informed Perspective)" completes a comprehensive 3-volume series, "Nuclear Insights: The Cold War Legacy." It is the unique technical qualifications and relevant experience of the lead author and his colleagues that brings to permanence a thorough history and evaluation of nuclear weaponry, including their origin, testing, stockpiles, delivery systems, and the current institutional burden. What to do with them, how to reduce the risk of nuclear accidents, and how to eliminate unnecessary systems and materials are the primary topics of this culminating volume. It's one thing to wish for and come out in favor of nuclear reductions; it's another (not so straightforward) matter to make permanent reductions.