In remembrance of the 25th anniversary, this definitive account of Columbine examines the aftermath and significance of the massacre. So begins a new preface, illustrating how Columbine became the template for nearly two decades of "spectacle murders." It is a false script, seized upon by a generation of new killers. In the wake of Newtown, Aurora, and Virginia Tech, the imperative to understand the crime that sparked this plague grows more urgent every year. Dave Cullen was one of the first reporters on the scene, and he spent ten years on this book, the definitive account. With a keen investigative eye and psychological acumen, he draws on mountains of evidence, insight from the world's leading forensic psychologists, and the killers' own words and drawings—several reproduced in a new appendix.