Columbine Guide blog

December 5, 2018

I am wrapping up final edits on my next book: Parkland: Birth of a Movement.

HaperCollins has been great about letting me keep adding and editing up until the final moments, because the release date is February 12, 2019.

It has to go to the printer in about ten days.

You...

October 10, 2017

The Psychology Behind Mass Shootings is the title of this week's Vanity Fair podcast "Inside the Hive with Nick Bilton. It's an in-depth interview with me, about what drives these mass killers, and what we can do about it. 

Part of the Vanity Fair preview:

Cullen ci...

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