The author of the 400,000-copy bestseller On Killing reveals how violent video games have ushered in a new era of mass homicide--and what we must do about it. Paducah, Kentucky, 1997: a 14-year-old boy shoots eight students in a prayer circle at his school. Littleton, Colorado, 1999: two high school seniors kill a teacher, twelve other students, and then themselves. Utoya, Norway, 2011: a political extremist shoots and kills sixty-nine participants...

Quinn "is a video game developer whose ex-boyfriend published a crazed blog post cobbled together from private information, half-truths, and outright fictions, along with a rallying cry to the online hordes to go after her. They answered in the form of a so-called movement known as #gamergate--they hacked her accounts; stole nude photos of her; harassed her family, friends, and colleagues; and threatened to rape and murder her. But instead of shrinking...