I just signed a dozen copies of Columbine at the Union Square Barnes & Noble in NYC.
They will ship virtually anywhere domestic or international.
Call this number to purchase/ship, and let them know that I signed all their copies on hand Friday night:
I had a lot of readers give them as Christmas gifts last year, and heard good things back. It sounds dark for the season, but most people want to get a book they can really dig in to.
BTW, I was happy to discover that B&N's flagship store had a stack of Columbine on the "Non-Fiction Favorites" table at the front of the store. Here's how it looked (after she put the autographed stickers on):