A book I can highly recommend is
Militant Islamist Ideology: Understanding the global threat
by Commander Youssef Aboul-Enien
Commander Aboul-Enien is serving on active duty in the US Navy. He is a Muslim. But what makes his book unique is his explanation of the history and culture of militant Islam and how it differs from Islam.
His writing style is clear and his research is accurate. I spend a bunch of my professional life reading books on Islam and most of them suck to be honest. They make the mistake of trying to consider Islam as one homogeneous entity. Commander Aboul-Enien dispels that myth rather well.
It is sold through the Naval Institute Press.
Its a good 'un
