You will feel sick reading this book. It will make you frustrated, melancholy, curious. I suffered nightmares and stomach aches.
Renting it from the library gave me only 21 days to cover the extensive 509 pages, which meant I was reading this book every moment I had free. The details surrounding the incident (how victims were killed, bodies left behind by the police, a teacher left for dead) left me feeling nauseous and appalled. Reading words from the killer themselves brought them back to life. Columbine by Dave Cullen is an enlightening, yet, stomach churning examination of the events leading up to, during, and following the Columbine High School Massacre of 1999.