The Green Zone details the chaotic and often counterproductive efforts of the Coalition Provisional Authority (CPA) in Iraq following the 2003 invasion. The book examines the internal workings, decision-making processes, and the personalities within the CPA, highlighting how a lack of planning and understanding of Iraqi society led to significant challenges. Chandrasekaran, drawing on his reporting and interviews, illustrates the disconnect between the ideals of the occupation and the harsh realities on the ground, focusing on the failures in establishing security, rebuilding infrastructure, and fostering a stable government.

The book offers a critical perspective on the early stages of the Iraq occupation, drawing on the author's direct experience and reporting. It is noted for its detailed account of the internal dynamics and decision-making within the Coalition Provisional Authority. The work highlights the significant challenges and failures in the post-invasion planning and reconstruction efforts. Chandrasekaran's reporting provides a close-up view of the complexities and consequences of the occupation.