Notable pieces on the deteriorating situation in Iraq (will be updated periodically)

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.