High Quality Content by WIKIPEDIA articles! Columbine is a non-fiction book written by Dave Cullen and published by Twelve on April 6, 2009. It is a comprehensive examination of the Columbine High School massacre, perpetrated by Eric Harris and Dylan Klebold on April 20, 1999. The book covers two major storylines: the killers` evolution leading up to the attack, and the survivors` struggles with aftermath over the next decade. Chapters alternate between the two stories. Graphic depictions of parts of the attack are also included, plus actual names of friends and family were used as well (the only exception was the pseudonym "Harriet" which was used for a girl whom Klebold was in love with and wrote obsessively about, as her real name has never been disclosed).