I say yes, expecially during luls in publishing of new material. Really though, threads on the B5 books and such, take up what? 2% of the topics. Thats not a whole lot. And if you don't like it, then just don't go into the thread. It is better then SPAM after all. And in Lit, you can be sure yoru reading stuff on books, by people who are interested in some of the same novels as you are.