27. Columbine

By Dave Cullen (408 pp)

This book is really tough to read and just as tough to put down. It's a journalistic account of what happened at Columbine H.S. in 1999. The author did incredible amounts of research and was committed to telling the whole story. There were so many things that the initial news accounts got wrong. He also talks about the events that came after. You've got to be ready for it but it's worth reading.