After ten years of meticulous research, author David Cullen has pieced together the definitive history on the Columbine massacre. Shattering many myths surrounding this tragedy, I was surprised at how much I learned (and didn't know) about this infamous shooting, which was covered ad nauseam for most of 1999. For starters, it was actually a bombing that went wrong; when the pipe bombs Harris and Klebold constructed turned out be complete duds, Plan B was quickly put into action, resulting in thirteen deaths. Nor were the two gunmen goths; the only reason they wore trench coats that day was to conceal their weapons. And of course, what better place to seek out bullying jocks than the library. Harris is shown in the book to be a classic psychopath who can be charming one minute and a monster the next. Hoping to kill far more people than he did, I was shocked to learn that local police knew all about Harris's website where he boasted about making pipe bombs and threatening other kids for more than a year before the shooting took place. Clearly, a massive cover-up took place within hours of the shooting in order to cover their tracks. And while reading this book, I still can't believe how clueless the killers' parents were. Considering the mountain of evidence, which included video tapes, diagrams and journal entries of what they planned to do, how could they not see it coming? "Son, how many times have I told you to put your pipe bombs away." Please. Unfortunately, since their testimonies are sealed until 2027, it will be a while before we know the whole story. Excellent job by the author at putting this book together, including the tips on how to spot potential school shooters and more importantly, what not to do.