You have made all the difference in getting the word out on Columbine. (Despite 13 weeks on the New York Times bestseller list, most people still don't know a book on Columbine exists.)
The video is now in the top 5 for key youtube and google searches, and on track for over 100,000 hits per year. That means people interested in the subject are finding it. Thanks.
To link, preferably use anchor text Columbine shooting (or just Columbine). Embeds are even better. (Much.) Or just click and give it a thumbs-up or favorite.
You might also consider Columbine as a $10 Christmas gift. (People just want a great read.)
More ideas on spreading the word. And if you never wrote an Amazon review, they still help. And I'm skyping again with schools and book clubs. Let a teacher or student near you know.
Also see Columbine Student Guide, Columbine Teacher's Guide, and Columbine research site.