IN THE MAIL: Cass Sunstein’s new book, Infotopia: How Many Minds Produce Knowledge. It’s interesting, because the original concept for An Army of Davids was going to be called Horizontal Knowledge, and was going to be something much closer to what Sunstein does in this book. That discussion wound up getting shrunk down to a single chapter in Army of Davids, as the book went in a different direction. But I always felt that the stuff I left out deserved more attention, and now I’m happy to see it getting some — and, no doubt, done better than I would have done it anyway.

Interestingly, the “discussion forum” for the book leads with this question: “Is having a discussion topic for each book necessary?”