Guardian: The meticulous record keeping of ISIL
Lawfare: "Calculuated Caliphate"
New Yorker: Legacy of the 2003 invasion
NY Review of Books: How al-Qaeda Changed the Syrian War;
Niqash: ISIS tactics in Mosul.
Washington Post: Why US is stuck with Maliki by Ali Khedery
From West Point's CTC: ISIL and Al-Baghdadi's psyop campaign.