It's hard for me to believe that it was ten years ago; I have to believe that I'm not the only one. CNN has an interesting article:
Debunking the Myths of Columbine.
"After a decade of research, including hundreds of interviews and relentless requests for evidence and documents, Kass also released a book this month called "Columbine: A True Crime Story." It provides comprehensive profiles of the killers and their motives."
I plan to read the book.