This work investigates the complex relationship between traditional Islamic theology and the political ideology adopted by the Islamic State (IS). Tim Jacoby, a scholar specializing in international relations and conflict, examines how the group utilizes, reinterprets, and distorts historical Islamic texts to justify its governance and military actions. The book provides a critical framework for understanding the divergence between mainstream Islamic practice and the specific, radicalized doctrine promoted by the organization.

Experts in the field of political science and religious studies recognize this text as a rigorous examination of the ideological foundations of modern militant groups. Readers frequently note the academic density of the prose, which provides a necessary, dispassionate analysis of a highly volatile subject.