Dave Cullen has been covering the blight of mass murders in America for two decades, first with Columbine, now Parkland: Birth of a Movement. Columbine was a New York Times bestseller and the consensus definitive account. Parkland, now a bestseller as well, is a story of hope: the genesis of the extraordinary March for Our Lives movement. Dave was with the students from the beginning, with unparalleled access behind the scenes.

​Columbine made two dozen Best of 2009 lists including New York Times, and won several major awards, including the Edgar and Goodreads Choice Award for best nonfiction of the year. It now appears on several all-time True Crime Top 10 lists.

Photo credit: Justin Bishop