I think sequelization is a pox upon the literary world. I would hazard to say that anything good I’ve ever read was a standalone work. Seldom does the “resolution-to-hook” ratio lead to a satisfying, let alone illuminating, reading experience. A popular book series is far more likely to end like the television series Lost than to pull all its outstanding narrative strings together coherently.
Unless you’re talking nonfiction, in which case I would be open to another volume of The Complete History of the World at some point.
Tiger Riding for Beginners 