Nuclear Weapons Law: Where Are We Now? (by William BOOTHBY and Wolff HEINTSCHEL von HEINEGG, Cambridge University Press, 2021) examines the law relating to the possession, threat, or use of nuclear weapons. It addresses the law regarding sovereignty, the threat or use of force, the conduct of nuclear hostilities, neutrality, weapons law, and war crimes — topics an effective national command, control, and communications system for nuclear weapons must address.