The nature and significance of the threat flows from the fact that ISIS is—all at the same time—a terrorist group, a state, and a revolutionary political movement. We have not faced an adversary like it before.

I was an intelligence officer for 33 years. When intelligence officers write or brief, they start with the bottom line. Here it is: ISIS poses a major threat to the US and to US interests abroad and that threat is growing every day.

A superb intelligence analyst and briefer, Morell now presents THE GREAT WAR OF OUR TIME, where he uses his talents to offer an unblinking and insightful assessment of CIA's counterterrorism successes and failures of the past twenty years and, perhaps most important, shows readers that the threat of terrorism did not die with Bin Ladin in Abbottabad. Morell illuminates new, growing threats from terrorist groups that, if unaddressed, could leave the country vulnerable to attacks that would dwarf 9/11 in magnitude.