Dave Cullen’s Columbine is widely considered the definitive account of the Columbine High School massacre, which occurred on April 20, 1999, in Littleton, Colorado. Unlike many immediate "rush-to-print" true crime paperbacks, Cullen spent ten years researching the event, conducting extensive interviews with survivors, victims' families, and investigators, and analyzing the killers' private diaries and police files.
"Columbine" has also had a tangible impact on the field of school violence research. Cullen's work has informed subsequent studies on the subject, and his findings have been cited by scholars and policymakers. The book's influence can also be seen in the increased focus on threat assessment and prevention programs in schools, which aim to identify and intervene in potential cases of violence. columbine by dave cullen pdf