Steven Lukes and Slavoj Zizek will be discussing their new books with Rebecca Mead tomorrow, September 3rd, from 7 to 9 p.m. at the Union Square Barnes & Noble. Lukes’s is Moral Relativism, and Zizek’s is Violence. Both are inaugural volumes in Picador’s new series of “Big Ideas/Small Books.” It’s going to be quite an event, believe me! Also, if you’re a Katha Pollitt fan (and in these baffling Sarah Palin days, who isn’t, or can afford not to be?), you may just get a glimpse of her. Consider it a tip!