The shock of the 2013 Boston Marathon bombings was soon followed by a revelation initially disturbing and mystifying: two apparently unremarkable brothers--one a teenager, the other a young adult; both well-liked immigrants and longtime U.S. residents--had allegedly triggered the bombs. Why were these two seemingly "normal" individuals driven to commit such acts of coldblooded violence? This book examines not only the lives, motivations, and key influences of these infamous brothers, but those of other young, unexpected terrorists worldwide, comparing factors that contributed to their...