This book is essential reading for anyone wanting to make sense of the recent rise in radical Islam. The early chapters explore the roots of radical thought from the early period of Islamic history. The second part of the book examines the recent rise of militant groups such as Al Qaeda, the Taliban and ISIS/ISIL. Containing useful maps and charts it is written in a clear and accessible style. It would appeal to the non-specialist who wants to better understand this complex topic but does not have the time or inclination to read a heavy academic tome.