Cass Sunstein (Chicago, Law)–whose new book for this year is about to come out–is “guest-blogging” at two different blogs with a lot of constitutional law coverage: Volokh (UCLA, Law) and Balkin (Yale, Law). In both cases, it appears the point is to introduce and promote his forthcoming book on FDR and “the second Bill of Rights.” The Volokh blog is, of course, no stranger to self-promotion, but this is an interesting change of pace, ideologically and otherwise.