Why all the car bombs, beheadings, and mass murders in the Middle East? Why the relentless killing of non-Muslims throughout the world by the followers of Muhammad's religion? Why Boston, Chattanooga, Paris, San Bernardino? People blame verses of the Koran for all of this, but it's not about the Koran.

Author F. W. Burleigh draws on an academic, investigative, and literary background to bring forth this penetrating look at the man behind it all. Burleigh's interest in Islam was sparked by the destruction of the World Trade Center on 9/11. The question guiding his...