The Way of the Knife by Mark Mazzetti
Fairly straightforward historical account of the US's shift from conventional military and spy operations to a semi-unified tactical approach using drones and commando operations. In doing so, Mazzetti shows how the pain of failed attempts at detention facilities (Abu Ghraib, Guantanamo, extraordinary rendition) shifted war tactics to prefer killing over capture.
This is a big topic, unfortunately Mazzetti can't hold back from making comments about matters he either trivializes or remains ignorant about:
"How we apply lethal force, and where we apply lethal force -- that's a huge debate that we really haven't had," he said. "There seems to be no problem with a Hellfire shot against a designated enemy in a place like Afghanistan, the tribal areas of Pakistan, Somalia, or Yemen." In those places, he said, it seems like just another part of war.
But, he asked, what if a suspected terrorist is in a place like Paris, or Hamburg, or somewhere else where drones can't fly, "and you use a CIA or [military] operative on the ground to shoot him in the back of the head?"
"Then," he said, "it's viewed as an assassination."
Rumsfeld had long been critical of the intelligence agency...
But now, in the midst of a new war, he realized he envied the spy agency's ability to send its operatives anywhere, at any time, without having to ask permission.
Me and my nation against the world. Me and my clan against my nation. Me and my family against the clan. Me and my brother against the family. Me against my brother. -- Somali Proverb( No friends, No religions )