Kaag and Kreps provide a solid introduction to the interactions between drones and Just War Theory, using a philosophical perspective to illuminate the moral costs of armed drones, particularly as used by the United States during the past decade of the War on Terror. This book is good for what it is-but it's a conventional reading that is in my opinion (as somebody who has written on this extensively) hobbled by the built-in blinders of Just War Theory: that military actions should be restricted in the name of universal ethics and justice, that States are responsible to the will of their population, that ethical deliberation informs and improves policy. Their argument is moderate, reasonable, pragmatic, and impotent compared to, say John Oliver's argument that "drones are making people afraid of the sky."

The Obama and Bush Administrations have been very careful in making sure that their policies adhere to Just War legal principles, and as such arguments centered on the ethics of Just War basically mirror the political positions of opposing camps on the validity of recent American military adventurism.

The book that I'd like to see would discuss the operations, tactics, and power of drone warfare. This is not that book.