Father-and-daughter team Roger and Sally Horchow sign copies of the St. Martin's edition of The Art of Friendship, a guidebook they first sold online to Neiman Marcus and Horchow customers last year. I never ran into Gawker's Team Party Crash, who appear to have been all over the Montblanc store snapping pics, but I did manage to say quick hellos to NYTBR editor Sam Tanenhaus and Times scribe Alex Williams, along with Malcolm Gladwell, who wrote about Roger Horchow as an example of awesome personal connectivity in The Tipping Point.