He's currently working on another Lecter novel, but I don't know the details of it. Rumour suggests that it is a prequel, but it may just as well take place after Hannibal. I had really hoped in Hannibal to see Starling and Graham team up to pursue Lecter, but things didn't turn out that way. It was a strange, unsatisfying book. Silence of the Lambs and Red Dragon, though, were excellent.