Dave Cullen is an American Non-fiction writer, freelance Journalist,[1] and Filmmaker. Cullen is best known for the books Columbine and Parkland: Birth of a Movement, and twenty-six years covering LGBT troops in the military. Both books were New York Times bestsellers, peaking at #3 and 14, respectively. Both received overwhelmingly positive reviews, were named to prominent best books of the year lists, and Columbine earned several major awards. (See awards section.) His upcoming book, Don't Fall in Love: The Secret Lives of Two Gay Soldiers Hiding in Plain Sight, began as a 2-part, 11,000-word magazine story on those soldiers, which won the 2000 GLAAD Media Award for best online story of the year.[2] Cullen has been following and interviewing them ever since.