Columbine, , Grand Central Publishing, Dave Cullen,Biography: general,Biography and non-fiction prose, gun control 2018;gun control;gun safety;walkout;march for our lives;gun control march;high school shooting;las vegas shooting;parkland shooter;parkland;parkland shooting;parkland students;parkland school;parkland florida;gun control;second amendment;school shooting;parkland shooting;parkland victims;school shooting parkland florida;florida school shooting;nikolas cruz;columbine shooting,, , United States, en-UShttps://www.hachettebookgroup.comgun control 2018;gun control;gun safety;walkout;march for our lives;gun control march;high school shooting;las vegas shooting;parkland shooter;parkland;parkland shooting;parkland students;parkland school;parkland florida;gun control;second amendment;school shooting;parkland shooting;parkland victims;school shooting parkland florida;florida school shooting;nikolas cruz;columbine shooting, [BLURB],[CITY],New York,books, ebooks, biblet, Book2look