"In this remarkable account of the April 20, 1999, Columbine High School shooting, journalist Cullen not only dispels several of the prevailing myths about the event but tackles the hardest question of all: why did it happen? Drawing on extensive interviews, police reports and his own reporting, Cullen meticulously pieces together what happened when 18-year-old Eric Harris and 17-year-old Dylan Klebold killed 13 people before turning their guns on themselves.... Cullen expertly balances the psychological analysis-enhanced by several of the nation's leading experts on psychopathology-with an examination of the shooting's effects on survivors, victims' families and the Columbine community. Readers will come away from Cullen's unflinching account with a deeper understanding of what drove these boys to kill, even if the answers aren't easy to stomach."